day02

Reviewed-on: #1

.gitignore

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+2024
+2023/*
+

2024/.vscode/launch.json

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+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Launch Package",
+            "type": "go",
+            "request": "launch",
+            "mode": "auto",
+            "program": "${fileDirname}",
+            "args": ["2"]
+        }
+    ]
+}

2024/gareth/day01/day01.go

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+package day01
+
+import (
+	"math"
+	"sort"
+	"strconv"
+	"strings"
+)
+
+func Part1(input string) int {
+	var leftList, rightList []float64
+	total := 0.0
+	lines := strings.Split(input, "\n")
+	for _, line := range lines {
+		sides := strings.Fields(line)
+		leftNum, _ := strconv.ParseFloat(sides[0], 64)
+		rightNum, _ := strconv.ParseFloat(sides[1], 64)
+		leftList = append(leftList, leftNum)
+		rightList = append(rightList, rightNum)
+	}
+
+	sort.Float64s(leftList)
+	sort.Float64s(rightList)
+
+	for i := 0; i < len(leftList); i++ {
+		total += math.Abs(leftList[i] - rightList[i])
+	}
+	return int(total)
+}
+
+func Part2(input string) int {
+	var leftList, rightList []int
+
+	lines := strings.Split(input, "\n")
+	for _, line := range lines {
+		sides := strings.Fields(line)
+		leftNum, _ := strconv.Atoi(sides[0])
+		rightNum, _ := strconv.Atoi(sides[1])
+		leftList = append(leftList, leftNum)
+		rightList = append(rightList, rightNum)
+	}
+
+	counts := make(map[int]int)
+	for _, num := range rightList {
+		counts[num]++
+	}
+
+	similarityScore := 0
+	for _, num := range leftList {
+		similarityScore += num * counts[num]
+	}
+
+	return similarityScore
+}

2024/gareth/day01/day01_test.go

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+package day01
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1(`3   4
+4   3
+2   5
+1   3
+3   9
+3   3`)
+	assert.Equal(t, 11, r)
+}
+
+func TestPart2(t *testing.T) {
+	r := Part2(`3   4
+4   3
+2   5
+1   3
+3   9
+3   3`)
+	assert.Equal(t, 31, r)
+}

2024/gareth/day02/day02.go

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+package day02
+
+import (
+	"math"
+	"strconv"
+	"strings"
+)
+
+func Part1(input string) int {
+	total := 0
+	lines := strings.Split(input, "\n")
+	for _, line := range lines {
+		var report []int
+		nums := strings.Fields(line)
+		for _, num := range nums {
+			intnum, _ := strconv.Atoi(num)
+			report = append(report, int(intnum))
+		}
+		if isSafe(report) {
+			total++
+		}
+	}
+	return total
+}
+
+func Part2(input string) int {
+	total := 0
+	lines := strings.Split(input, "\n")
+	for _, line := range lines {
+		var report []int
+		nums := strings.Fields(line)
+		for _, num := range nums {
+			intnum, _ := strconv.Atoi(num)
+			report = append(report, int(intnum))
+		}
+		if isSafeWithDampener(report) {
+			total++
+		}
+	}
+	return total
+}
+
+func isSafe(report []int) bool {
+	increasing := report[1] > report[0]
+	decreasing := report[1] < report[0]
+
+	for i := 1; i < len(report); i++ {
+		diff := report[i] - report[i-1]
+		absDiff := int(math.Abs(float64(diff)))
+
+		if absDiff < 1 || absDiff > 3 {
+			return false
+		}
+
+		if (diff > 0 && !increasing) || (diff < 0 && !decreasing) {
+			return false
+		}
+	}
+
+	return true
+}
+
+func isSafeWithDampener(report []int) bool {
+	if isSafe(report) {
+		return true
+	}
+
+	for i := 0; i < len(report); i++ {
+		modifiedReport := append(report[:i], report[i+1:]...)
+		if isSafe(modifiedReport) {
+			return true
+		}
+	}
+
+	return false
+}

2024/gareth/day02/day02_test.go

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+package day02
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1(`7 6 4 2 1
+1 2 7 8 9
+9 7 6 2 1
+1 3 2 4 5
+8 6 4 4 1
+1 3 6 7 9`)
+	assert.Equal(t, 2, r)
+}
+
+func TestPart2(t *testing.T) {
+	r := Part2(`7 6 4 2 1
+1 2 7 8 9
+9 7 6 2 1
+1 3 2 4 5
+8 6 4 4 1
+1 3 6 7 9`)
+	assert.Equal(t, 4, r)
+}

2024/gareth/day02/poc.py

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+def is_safe(report):
+    increasing = report[1] > report[0]
+    decreasing = report[1] < report[0]
+
+    for i in range(1, len(report)):
+        diff = report[i] - report[i - 1]
+        abs_diff = abs(diff)
+        if abs_diff < 1 or abs_diff > 3:
+            return False
+        if (diff > 0 and not increasing) or (diff < 0 and not decreasing):
+            return False
+
+    return True
+
+def is_safe_with_dampener(report):
+    if is_safe(report):
+        return True
+    for i in range(len(report)):
+        modified_report = report[:i] + report[i+1:]
+        if is_safe(modified_report):
+            return True
+
+    return False
+
+def read_reports_from_file(filename):
+    reports = []
+    with open(filename, 'r') as file:
+        for line in file:
+            report = list(map(int, line.split()))
+            reports.append(report)
+    return reports
+
+def main():
+    filename = 'input.txt' 
+    reports = read_reports_from_file(filename)
+
+    safe_count = 0
+    for report in reports:
+        if is_safe_with_dampener(report):
+            safe_count += 1
+
+    print("OUTPUT:", safe_count)
+
+if __name__ == "__main__":
+    main()

2024/gareth/day03/day03.go

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+package day03
+
+import (
+	"regexp"
+	"strconv"
+)
+
+func Part1(input string) int {
+	total := 0
+
+	regex := regexp.MustCompile(`mul\((\d+),(\d+)\)`)
+	matches := regex.FindAllStringSubmatch(input, -1)
+
+	for _, match := range matches {
+		if len(match) == 3 {
+			x, _ := strconv.Atoi(match[1])
+			y, _ := strconv.Atoi(match[2])
+			total += x * y
+		}
+	}
+	return total
+}
+
+func Part2(input string) int {
+	total := 0
+	isEnabled := true
+
+	mulRegex := regexp.MustCompile(`mul\((\d+),(\d+)\)`)
+	doRegex := regexp.MustCompile(`do\(\)`)
+	dontRegex := regexp.MustCompile(`don't\(\)`)
+
+	tokenizeRegex := regexp.MustCompile(`(mul\(\d+,\d+\)|do\(\)|don't\(\))`)
+	tokens := tokenizeRegex.FindAllString(input, -1)
+
+	for _, token := range tokens {
+		if doRegex.MatchString(token) {
+			isEnabled = true
+		} else if dontRegex.MatchString(token) {
+			isEnabled = false
+		} else if mulRegex.MatchString(token) && isEnabled {
+			mulMatch := mulRegex.FindStringSubmatch(token)
+			x, _ := strconv.Atoi(mulMatch[1])
+			y, _ := strconv.Atoi(mulMatch[2])
+			total += x * y
+		}
+	}
+
+	return total
+}

2024/gareth/day03/day03_test.go

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+package day03
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1(`xmul(2,4)%&mul[3,7]!@^do_not_mul(5,5)+mul(32,64]then(mul(11,8)mul(8,5))`)
+	assert.Equal(t, 161, r)
+}
+
+func TestPart2(t *testing.T) {
+	r := Part2(`xmul(2,4)&mul[3,7]!^don't()_mul(5,5)+mul(32,64](mul(11,8)undo()?mul(8,5))`)
+	assert.Equal(t, 48, r)
+}

2024/gareth/day03/input.txt

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+-:-]what()(+/mul(957,396)?mul(550,844)%+why())-? #}from()mul(488,628)%} ~**mul(770,931)$~mul(791,733)<{mul(985,350)<#why()don't()what()select()$what())]what()who()mul(327,185))<^^mul(542,68)#?who()<from()';^how()mul(619,952)/where(){(!);'@,mul(551,161)select()>when()do()from()mul(51,291)[where()!{]/}'@?mul(233,511)@what()]mul(311,967))&who()how()mul(839,578)^who()]}mul(266,735){mul(176,670)mul(154,710)*select()](':^,mul(531,801)# *why()why()mul(30,325)~,where();select()select()}-/when()mul(512,729)+where();[mul(720,339)[~*when()mul(722,867)!);{+mul(582,286)^:)what()@mul(604,485) (who()why()who()from()[mul(128,295)how()?!%~~<what()mul(156,267)'how(689,161):where()mul(206,221) mul(835,81);] %mul(562,798)^{%where()mul(38,166)#!what()mul(185,550)^! ?,+;}}mul(685,101)select()mul(316,869)>[~}{[&;mul(548,186))(%];mul(841,290)when()where()'?mul(646,803)mul(553,782)how()when()-mul(569,604)@ ++:/%why()]select()mul(257,598)#mul(897,819)how()what()from()how()]when()~/!}mul(856,271)+&why(){}why()>who()mul(373,408)-who()^&%>';,when()mul(54,88)what()!mul(663,711)$#(?;^from()mul(898,810)when()from()%@mul(776,102)why()mul(303,842)!/,%<^;mul(840,791){[@mul(909,714)don't()>who()why()from(545,686)%~mul(483,956)^'why()from()where()$>*:mul(931,649) mul(800,313)):mul(31,69)mul(549,670)$;mul(327,976)@who()^mul(627,907)/[@what(925,706) ;^who()!mul(629,813)when(){$&where(){#mul(504,147)?mul(222,429)#who()*/!select()<what()mul(310,934)])^/$]mul(917,911)-%how()?[;,mul(823,273)*[~select()/select()~%mul(703,815)what()where()?what():'?[who()mul(966,52)how()&-~(%[(^mul(913,694)mul(190,570),&<%'from()where()what(979,309):+mul(662,926)/<!when()'select(),/&*mul(655,410) how()}mul(386,934)where()[mul(159,595)@']from()when()#?@mul(356,559)&)>?$ mul(439,336)?from()*select()*}when()]who()mul(148,356)(who()+mul(271,905)mul(564,172)@?(~mul(628,470)#} mul(301,170)?@,^don't();&:^&how(605,264))(what()'mul(896,108),$mul(413,431):<>where();how()>!}when()do()!}/&:when()>mul(754,737)~:#:* mul(962,620)}mul(26,490)!~,mul(450,234){/]who() <;{mul(938,932)?--#%};}mul(140,314)(-}/,[mul(202,839)^why()-!},mul(459,716),mul(600,932)}when()]who()}who())&mul(752,142$mul(174,573)mul(231,182)from()mul(308,661)what()} mul(178,99)&^*[(mul(858,730)~}from()^mul(17,545)what()~{~*^what(90,714)how(),mul(63,969)-]mul(364,49);mul(130,598<:&why()select(879,794)mul(46,169)>&how()%mul(564,506)/what(255,868)mul(415,375)':@who()mul(525,772)<$mul(277,787)[~mul(314,321)'&@$^%mul(741,325)?(%#;*mul(459,703)why()~what()mul(250,38)what()<-$)when()%(don't()mul(296 ',mul(673,933)?#<@who()from()^?mul(831,912)?/*mul(407,853)mul(119what()why()>mul(816,762) how()<}~from()how()/@:mul(792,799)()@?%:$:mul(289,264)
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+what())[$^+why()mul(118,89)mul(689,203)#,,what()what()mul(633,394)from();~from()!where()*?@mul(568,753)/[+when()?%:mul(828,475)what()don't()-;@ mul(509,544)[when()};<+'(mul(235,757)<+:%select():mul(241,373)$mulselect() (%where()where()]-)mul(306,62)from()what()mul(285,414)!*&&>who()#mul(543,866)/~select()[+don't()/><why()from() ~#mul(983,515)#mul(731,258)mul(894,831){>)where()!when(),'mul(701,189)/';!:]+how(902,507)-^mul(847,104)mul(883,112){'~}&mul(697,190)what()%![!<where()@why(319,27)select()mul(468,827)/mul(914,407@ where(661,684)mul(850,467);don't(){what()##*%mul(175,88)>(why()@^where()who()mul(843,4)%what()&-%mul(945,389)#<)select()mul(690,755):mul(774,780)}mul(940,623)%where() ?where()(}^!mul(34,627)mul(479,281)#}>what(157,964)select(){how()why()<don't()(*>+who(640,716),mul(117,249)mul(395,14)-]( ~(how()-mul(220,860)+^mul(765,74)select(),$who()<mul(685,855)!what()where()why()#{,-;mul(302+^(who()]from()~<?where():mul(383,623)::~(>,@mul(639,551);(mul(26,80)why(480,988)^why():? <[mul(672,116@mul(316,879)}mul(498,582)  @,:{'why(589,887)mul(39;]mul(855,31)^from()?mul(93,510)mulwho(){@-what()<where()~select()mul(225,679) 'mul(305,662)/:,mul(887,727)?:~:&/select()#:<mul(755,830)^#}+@)how()?^mul(14,79)-mul(433,926)what()'mul(458,711)>from();where()from()~:(mul(688,799)~when()>from()-select()who()~<mul(71,560)( who()? +#^who()[mul(70,477)}>#+{ >mul(275,916)#?-mul(359,865)where(441,672)'}what()[from()when()<>who()mul(909,227)$:!'mul(330,478)!?[;(+#what(919,466)&/mul(73,181)[{how()mul(403,182);mul(249,968):!from()?!{#-mul(661,975)!-;}'mul(999,285)select(565,140)+>@,$:from(47,825)~!mul(599,436))<when(603,518)@mul(567,365)?(}}where()<{:who()?mul(755,613) <*who()mul(448,608)$$mul(507,887)mulwhen()]when()^$+@();+mul(846,707)]mul(932,511)who()}}where()#mul(122,316)#>+ [>%!mul(959,617)mul(5,150)where()@;&mul(630,775)<select(686,710)who()/';[*%select()mul(859,837)'mul(451,3)(when()($/+mul(499,794){]mul(194,78)from()'?don't();mul(47,314){who()~/]mul(526,464)why(666,133)#}/;]:mul(223,721)how()><&-:;mul(114,820[don't()when()#how()mul(976,290;+-from()where()]mul(338,47)when()what()where()%]mul*who() #+what()mul(679,324)mul(859,321)%'mul(446,297),#select();<mul(797,938)who()mul(531,845)}*select()@{mul(661,677)/)'*mul(837,800)<who()select()<]}<@mul(844,594))when()where():'mul(75,307)mul(676,67)(]what()<select()?mul(851,92)+&)mul(683,41)?<,/:~'mul(179where()from()~<mul(674,897)/!how(529,298) *[}from(),mul(362,131)}! % $mul(168,955)mul(517,218)[(,mul(740,567)}~[)$@from(),do();]mul%/%]why()mul(777,920)what()what()$;<what()mul(307,462)-+from()what()/$select()select()do()<select()&from()why()why()&mul(522,562))<how()-!+when(413,672)&)mul(621~(?select()<*-why()mul(372,852)}]~mul(668,335)mul(512,514){%mul(873,547)[*(mul(887,814)]>';from()mul(206,301)why()-'mul(87,734)<where()+:mul(844,819){#^^mul(130,409)[('@what() ;mul(916,629)@@who()-?}mul(320,288)what()?mul(184,677)[@#select()+::-select(929,36)/mul(329,568)
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2024/gareth/day04/day04.go

@@ -0,0 +1,91 @@
+package day04
+
+import (
+	"strings"
+)
+
+var directions = [8][2]int{
+	{0, 1},
+	{0, -1},
+	{1, 0},
+	{-1, 0},
+	{1, 1},
+	{1, -1},
+	{-1, 1},
+	{-1, -1},
+}
+
+func Part1(input string) int {
+	grid := parseInput(input)
+	return countXMAS(grid)
+}
+
+func Part2(input string) int {
+	grid := parseInput(input)
+	return countXMASPatterns(grid)
+}
+
+func parseInput(input string) [][]rune {
+	lines := strings.Split(strings.TrimSpace(input), "\n")
+	grid := make([][]rune, len(lines))
+	for i, line := range lines {
+		grid[i] = []rune(line)
+	}
+	return grid
+}
+
+func countXMAS(grid [][]rune) int {
+	rows := len(grid)
+	cols := len(grid[0])
+	target := "XMAS"
+	total := 0
+
+	for r := 0; r < rows; r++ {
+		for c := 0; c < cols; c++ {
+			for _, d := range directions {
+				dr, dc := d[0], d[1]
+				found := true
+
+				for k := 0; k < len(target); k++ {
+					nr := r + k*dr
+					nc := c + k*dc
+					if nr < 0 || nr >= rows || nc < 0 || nc >= cols || grid[nr][nc] != rune(target[k]) {
+						found = false
+						break
+					}
+				}
+
+				if found {
+					total++
+				}
+			}
+		}
+	}
+	return total
+}
+
+func countXMASPatterns(grid [][]rune) int {
+	rows := len(grid)
+	cols := len(grid[0])
+	total := 0
+
+	for r := 1; r < rows-1; r++ {
+		for c := 1; c < cols-1; c++ {
+
+			topLeft := grid[r-1][c-1]
+			topRight := grid[r-1][c+1]
+			center := grid[r][c]
+			bottomLeft := grid[r+1][c-1]
+			bottomRight := grid[r+1][c+1]
+
+			if center == 'A' && ((topLeft == 'S' && topRight == 'S' && bottomLeft == 'M' && bottomRight == 'M') ||
+				(topLeft == 'S' && topRight == 'M' && bottomLeft == 'S' && bottomRight == 'M') ||
+				(topLeft == 'M' && topRight == 'M' && bottomLeft == 'S' && bottomRight == 'S') ||
+				(topLeft == 'M' && topRight == 'S' && bottomLeft == 'M' && bottomRight == 'S')) {
+				total++
+			}
+		}
+	}
+
+	return total
+}

2024/gareth/day04/day04_test.go

@@ -0,0 +1,35 @@
+package day04
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1(`MMMSXXMASM
+MSAMXMSMSA
+AMXSXMAAMM
+MSAMASMSMX
+XMASAMXAMM
+XXAMMXXAMA
+SMSMSASXSS
+SAXAMASAAA
+MAMMMXMMMM
+MXMXAXMASX`)
+	assert.Equal(t, 18, r)
+}
+
+func TestPart2(t *testing.T) {
+	r := Part2(`MMMSXXMASM
+MSAMXMSMSA
+AMXSXMAAMM
+MSAMASMSMX
+XMASAMXAMM
+XXAMMXXAMA
+SMSMSASXSS
+SAXAMASAAA
+MAMMMXMMMM
+MXMXAXMASX`)
+	assert.Equal(t, 9, r)
+}

2024/gareth/day04/input.txt

@@ -0,0 +1,140 @@
+XASXMAXXMSXXSMMSXMMSMXSMXMSSMSSSMMSMAMXMXSMMMMAXAMXSASXSSMMSSMXAMXMSAMXMMXAXXXSAMXXXXXMMXSXMXXSMASAMXMXAXXMASAMXXXMAMMMSXSXMXMMMSAASXSMSSMMS
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+MXSXMAAMXAAAXMMSSMAXMASXSSSSMMSMMSXSASMSMSSMMMAAAXXXXMMMMMXXAMMAAAASMMAAAXMASMXXXAAASAMMXSASASMMMAMXSASASASMAXXMAMSSSMSSMMAXSMMSXMMMMMMMXAMX
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+XXXXMAMMMSSSMXSXSASXAXSXMASAMXSMXMASMSMSXMASXXMMXMXSAMMXMAXAMAXXSXSAASMASXMXAMXMMMAASMXXAMXMMAXMXMSMSAMSSMSMMSSSSMMMSXMXMASXSMMXAXAXSSSMXAAX
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2024/gareth/day05/day05.go

@@ -0,0 +1,134 @@
+package day05
+
+import (
+	"strconv"
+	"strings"
+)
+
+type Rule struct {
+	X, Y int
+}
+
+func ParseInput(input string) ([]Rule, [][]int) {
+	sections := strings.Split(input, "\n\n")
+
+	ruleLines := strings.Split(strings.TrimSpace(sections[0]), "\n")
+	var rules []Rule
+	for _, ruleLine := range ruleLines {
+		parts := strings.Split(ruleLine, "|")
+		x, _ := strconv.Atoi(parts[0])
+		y, _ := strconv.Atoi(parts[1])
+		rules = append(rules, Rule{X: x, Y: y})
+	}
+
+	updateLines := strings.Split(strings.TrimSpace(sections[1]), "\n")
+	var updates [][]int
+	for _, updateLine := range updateLines {
+		parts := strings.Split(updateLine, ",")
+		var update []int
+		for _, part := range parts {
+			page, _ := strconv.Atoi(part)
+			update = append(update, page)
+		}
+		updates = append(updates, update)
+	}
+
+	return rules, updates
+}
+
+func ValidateUpdate(update []int, rules []Rule) bool {
+	indexMap := make(map[int]int)
+	for i, page := range update {
+		indexMap[page] = i
+	}
+
+	for _, rule := range rules {
+		pageX, indexX := indexMap[rule.X]
+		pageY, indexY := indexMap[rule.Y]
+		if indexX && indexY && pageX > pageY {
+			return false
+		}
+	}
+
+	return true
+}
+
+func FindMiddle(update []int) int {
+	n := len(update)
+	return update[n/2]
+}
+
+func SortUpdate(update []int, rules []Rule) []int {
+	depen := make(map[int][]int)
+	for _, rule := range rules {
+		depen[rule.Y] = append(depen[rule.Y], rule.X)
+	}
+
+	visited := make(map[int]bool)
+	var sorted []int
+
+	for _, page := range update {
+		if !visited[page] {
+			sorted = Visit(page, depen, visited, update, sorted)
+		}
+	}
+
+	return sorted
+}
+
+func Visit(page int, depen map[int][]int, visited map[int]bool, update []int, sorted []int) []int {
+	if visited[page] {
+		return sorted
+	}
+	visited[page] = true
+
+	for _, d := range depen[page] {
+		if contains(update, d) {
+			sorted = Visit(d, depen, visited, update, sorted)
+		}
+	}
+
+	sorted = append(sorted, page)
+	return sorted
+}
+
+func contains(slice []int, element int) bool {
+	for _, item := range slice {
+		if item == element {
+			return true
+		}
+	}
+	return false
+}
+
+func Part1(input string) int {
+	rules, updates := ParseInput(input)
+	total := 0
+
+	for _, update := range updates {
+		if ValidateUpdate(update, rules) {
+			total += FindMiddle(update)
+		}
+	}
+
+	return total
+}
+
+func Part2(input string) int {
+	rules, updates := ParseInput(input)
+	var invalidUpdates [][]int
+	total := 0
+
+	for _, update := range updates {
+		if !ValidateUpdate(update, rules) {
+			invalidUpdates = append(invalidUpdates, update)
+		}
+	}
+
+	for _, update := range invalidUpdates {
+		sortedUpdate := SortUpdate(update, rules)
+		total += FindMiddle(sortedUpdate)
+	}
+
+	return total
+}

2024/gareth/day05/day05_test.go

@@ -0,0 +1,71 @@
+package day05
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1(`47|53
+97|13
+97|61
+97|47
+75|29
+61|13
+75|53
+29|13
+97|29
+53|29
+61|53
+97|53
+61|29
+47|13
+75|47
+97|75
+47|61
+75|61
+47|29
+75|13
+53|13
+
+75,47,61,53,29
+97,61,53,29,13
+75,29,13
+75,97,47,61,53
+61,13,29
+97,13,75,29,47`)
+	assert.Equal(t, 143, r)
+}
+
+func TestPart2(t *testing.T) {
+	r := Part2(`47|53
+97|13
+97|61
+97|47
+75|29
+61|13
+75|53
+29|13
+97|29
+53|29
+61|53
+97|53
+61|29
+47|13
+75|47
+97|75
+47|61
+75|61
+47|29
+75|13
+53|13
+
+75,47,61,53,29
+97,61,53,29,13
+75,29,13
+75,97,47,61,53
+61,13,29
+97,13,75,29,47`)
+	assert.Equal(t, 123, r)
+}

2024/gareth/day06/day06.go

@@ -0,0 +1,142 @@
+package day06
+
+import (
+	"strings"
+)
+
+type Point struct {
+	x         int
+	y         int
+	direction int
+}
+
+const (
+	Up    = 0
+	Right = 1
+	Down  = 2
+	Left  = 3
+)
+
+var rows, cols int
+
+var moves = []Point{
+	{-1, 0, Up},
+	{0, 1, Up},
+	{1, 0, Up},
+	{0, -1, Up},
+}
+
+func Part1(input string) int {
+	grid, start, direction := ParseInput(input)
+	total := PredictPath(grid, start, direction)
+	return total
+}
+
+func Part2(input string) int {
+	grid, start, direction := ParseInput(input)
+	total := FindLoopingPositions(grid, start, direction)
+	return total
+}
+
+func ParseInput(input string) ([][]rune, Point, int) {
+	lines := strings.Split(strings.TrimSpace(input), "\n")
+	rows = len(lines)
+	cols = len(lines[0])
+	grid := make([][]rune, rows)
+
+	var start Point
+	var direction int
+
+	for i := 0; i < rows; i++ {
+		grid[i] = []rune(lines[i])
+		for j, char := range lines[i] {
+			if char == '^' {
+				start = Point{i, j, Up}
+				direction = Up
+			} else if char == '>' {
+				start = Point{i, j, Right}
+				direction = Right
+			} else if char == 'v' {
+				start = Point{i, j, Down}
+				direction = Down
+			} else if char == '<' {
+				start = Point{i, j, Left}
+				direction = Left
+			}
+		}
+	}
+
+	return grid, start, direction
+}
+
+func PredictPath(grid [][]rune, start Point, direction int) int {
+	visited := make(map[Point]bool)
+	current := start
+
+	visited[current] = true
+
+	// do while
+	for {
+		next := Point{current.x + moves[direction].x, current.y + moves[direction].y, Up}
+
+		if next.x < 0 || next.x >= rows || next.y < 0 || next.y >= cols {
+			break
+		}
+
+		if grid[next.x][next.y] == '#' {
+			direction = (direction + 1) % 4
+		} else {
+			current = next
+			visited[current] = true
+		}
+	}
+
+	return len(visited)
+}
+
+func FindLoopingPositions(grid [][]rune, start Point, direction int) int {
+	possiblePositions := 0
+
+	for i := 0; i < rows; i++ {
+		for j := 0; j < cols; j++ {
+			if grid[i][j] != '.' || (i == start.x && j == start.y) {
+				continue
+			}
+
+			grid[i][j] = '#'
+			if IsLooping(grid, start, direction) {
+				possiblePositions++
+			}
+			grid[i][j] = '.'
+		}
+	}
+
+	return possiblePositions
+}
+
+func IsLooping(grid [][]rune, start Point, direction int) bool {
+	visited := make(map[Point]int)
+	current := start
+
+	step := 0
+	for {
+		step++
+		next := Point{current.x + moves[direction].x, current.y + moves[direction].y, direction}
+
+		if next.x < 0 || next.x >= rows || next.y < 0 || next.y >= cols {
+			return false
+		}
+
+		if grid[next.x][next.y] == '#' {
+			direction = (direction + 1) % 4
+		} else {
+			current = next
+
+			if visitStep, ok := visited[current]; ok && step-visitStep > 4 {
+				return true
+			}
+
+			visited[current] = step
+		}
+	}
+}

2024/gareth/day06/day06_test.go

@@ -0,0 +1,35 @@
+package day06
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1(`....#.....
+.........#
+..........
+..#.......
+.......#..
+..........
+.#..^.....
+........#.
+#.........
+......#...`)
+	assert.Equal(t, 41, r)
+}
+
+func TestPart2(t *testing.T) {
+	r := Part2(`....#.....
+.........#
+..........
+..#.......
+.......#..
+..........
+.#..^.....
+........#.
+#.........
+......#...`)
+	assert.Equal(t, 6, r)
+}

2024/gareth/day06/input.txt

@@ -0,0 +1,130 @@
+#.............#.#...........................................................#..........#...........................#..........#...
+............#......................#.......#..#.........#...................##....................................................
+..............#...........#..#.......#.........#.#...........................#................................#......#............
+.....#......................................#......#..#...................#....................#......................#...........
+...#............................#................................#................................................................
+..........#..................#.....#......................................................#.......................................
+..#........#.......#.#...............................................................#......#.................................#...
+.#....#................#................#.....#...................#...............................................#..#............
+.......................................................................................#...#.#....#........##......#........#.#.##
+............................................#.................#.....................#..........................#..................
+....#..........##......................#.................................................................................#........
+......#.............##.........#.......#.........#.......#.............#...#.......#..............................................
+.#............................................................................#..........#....#...................................
+...#..#....#..............................#...........................................................................#...........
+.............#....................................................................................................................
+................................#..................##...................................#...............................#......#..
+..........#.........#.................#..........###...........................................#............#...#.................
+.............#....................................#.......#.#.#............#............................................#.........
+......#.#..............................................................................................#.........................#
+...#...#.........#.........#..#......#................##.................#........................................................
+.................................#......................#........#................#........................#......................
+.......................##..............#................#................#..............................#.........................
+.......#...#.....#.....##........................#..................##.....#......................................................
+.............................................#...........................#..........................................#.....#.......
+.........................#...............#....#..............#.......#...............#.#.................#.................#......
+...........................................................#....#..................................#..............................
+..........................#.................................................#............................##....#..................
+.................#...#.........................................................#........................#.....#..#................
+.........................#....#................................................#...#.....................#....#...........#.......
+................................................##.......#.#....................................#.......##........................
+..........##...#.......................#....#..#....................#........................#....................................
+#......#.......................#............#.....................................................................#...............
+.......#.......#...#..#..........#.......................................#.............#......#...................................
+...............#............#..................#.................................................................................#
+.......#...........#.......................##.....#.........#...........#...................#......#.........#.............##....#
+...................#.........................#......#..........................................#..........#.........#......#......
+.....#............#..............#...#......#....................#.............#..................................................
+................................................#........#.....#...................#.....................................#.....#..
+......................#.#...##......................##...............................................#.................#..........
+#...................#.........................#...........#.....#................#.....................#...................#......
+....#................#.....#.............#.....................................#....#...#.................................#.......
+.........#.....................................................................................................#.#.......#........
+.........#..........##..............................#............................#.#.............................#................
+#....#.#..............................................##...#...#...............#.............#....................................
+........#..#.#...................#.......................................................................#.............#..#.#...#.
+.................................................................................................................#.......#........
+............................................#..#...............##........#..........#.......................................#....#
+........#...........................#............................#.....#........................#..........#...#..........#.......
+.#...........#...................................................#...........................................#................#.#.
+............#...............................#........#...........#..........#...........#.#..............#........................
+...............................................................................##.#................#..............................
+.#.......................#.#...........#..................................#.......................................................
+..#..............................................##................#.......#....#..............#.....................#...#........
+...................#.....#................................................#..........#.........#.........#.....................#..
+........#................#................................................................................#......#................
+...................#...#....#.........................#.........................#....................#..........................#.
+.................#.......................................................#................................................#.......
+..#...........................##.#.............#..#............................................#.......................#.#........
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+.........................................................#...........................##..........#........#.##....................

2024/gareth/day07/day07.go

@@ -0,0 +1,90 @@
+package day07
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+func Part1(input string) int {
+	total := 0
+	lines := strings.Split(strings.TrimSpace(input), "\n")
+
+	for i := 0; i < len(lines); i++ {
+		target, numbers := parseLine(lines[i])
+		if validLinePart1(numbers, 1, numbers[0], target) {
+			total += target
+		}
+	}
+
+	return total
+}
+
+func Part2(input string) int {
+	total := 0
+	lines := strings.Split(strings.TrimSpace(input), "\n")
+
+	for i := 0; i < len(lines); i++ {
+		target, numbers := parseLine(lines[i])
+		if validLinePart2(numbers, 1, numbers[0], target) {
+			total += target
+		}
+	}
+
+	return total
+}
+
+func parseLine(line string) (int, []int) {
+	parts := strings.Split(line, ":")
+	target, _ := strconv.Atoi(strings.TrimSpace(parts[0]))
+	numberStrings := strings.Fields(parts[1])
+
+	numbers := make([]int, len(numberStrings))
+	for i := 0; i < len(numberStrings); i++ {
+		numbers[i], _ = strconv.Atoi(strings.TrimSpace(numberStrings[i]))
+	}
+
+	return target, numbers
+}
+
+func validLinePart1(numbers []int, index int, currentValue int, target int) bool {
+	if index == len(numbers) {
+		return currentValue == target
+	}
+
+	sum := currentValue + numbers[index]
+	if validLinePart1(numbers, index+1, sum, target) {
+		return true
+	}
+
+	product := currentValue * numbers[index]
+	if validLinePart1(numbers, index+1, product, target) {
+		return true
+	}
+
+	return false
+}
+
+func validLinePart2(numbers []int, index int, currentValue int, target int) bool {
+	if index == len(numbers) {
+		return currentValue == target
+	}
+
+	sum := currentValue + numbers[index]
+	if validLinePart2(numbers, index+1, sum, target) {
+		return true
+	}
+
+	product := currentValue * numbers[index]
+	if validLinePart2(numbers, index+1, product, target) {
+		return true
+	}
+
+	// Turns 12 || 34 into 1234
+	concatenated, _ := strconv.Atoi(strings.TrimSpace(fmt.Sprintf("%d%d", currentValue, numbers[index])))
+	if validLinePart2(numbers, index+1, concatenated, target) {
+		return true
+	}
+
+	return false
+}

2024/gareth/day07/day07_test.go

@@ -0,0 +1,33 @@
+package day07
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1(`190: 10 19
+3267: 81 40 27
+83: 17 5
+156: 15 6
+7290: 6 8 6 15
+161011: 16 10 13
+192: 17 8 14
+21037: 9 7 18 13
+292: 11 6 16 20`)
+	assert.Equal(t, 3749, r)
+}
+
+func TestPart2(t *testing.T) {
+	r := Part2(`190: 10 19
+3267: 81 40 27
+83: 17 5
+156: 15 6
+7290: 6 8 6 15
+161011: 16 10 13
+192: 17 8 14
+21037: 9 7 18 13
+292: 11 6 16 20`)
+	assert.Equal(t, 11387, r)
+}

2024/gareth/day07/input.txt

@@ -0,0 +1,850 @@
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2024/gareth/day08/day08.go

@@ -0,0 +1,80 @@
+package day08
+
+import (
+	"math"
+	"strings"
+)
+
+type Coordinate struct {
+	Row int
+	Col int
+}
+
+func Part1(input string) int {
+	grid, antennaMap := parseInput(input)
+	result := findAntinodes(grid, antennaMap, true)
+	return result
+}
+
+func Part2(input string) int {
+	grid, antennaMap := parseInput(input)
+	result := findAntinodes(grid, antennaMap, false)
+	return result
+}
+
+func parseInput(input string) ([][]rune, map[rune][]Coordinate) {
+	lines := strings.Split(input, "\n")
+	rowCount := len(lines)
+	colCount := len(lines[0])
+	grid := make([][]rune, rowCount)
+	antennaMap := make(map[rune][]Coordinate)
+
+	for row := 0; row < rowCount; row++ {
+		grid[row] = []rune(lines[row])
+		for col := 0; col < colCount; col++ {
+			frequency := grid[row][col]
+			if frequency != '.' {
+				antennaMap[frequency] = append(antennaMap[frequency], Coordinate{Row: row, Col: col})
+			}
+		}
+	}
+
+	return grid, antennaMap
+}
+
+func findAntinodes(grid [][]rune, antennaMap map[rune][]Coordinate, onlySpecial bool) int {
+	rowCount := len(grid)
+	colCount := len(grid[0])
+	uniqueAntinodes := make(map[Coordinate]struct{})
+
+	for row := 0; row < rowCount; row++ {
+		for col := 0; col < colCount; col++ {
+			for _, antennaPositions := range antennaMap {
+				for i, firstAntenna := range antennaPositions {
+					for j, secondAntenna := range antennaPositions {
+						//I know I know thats too many for loops
+						if i != j {
+							distance1 := int(math.Abs(float64(row-firstAntenna.Row)) + math.Abs(float64(col-firstAntenna.Col)))
+							distance2 := int(math.Abs(float64(row-secondAntenna.Row)) + math.Abs(float64(col-secondAntenna.Col)))
+
+							rowDiff1 := row - firstAntenna.Row
+							rowDiff2 := row - secondAntenna.Row
+							colDiff1 := col - firstAntenna.Col
+							colDiff2 := col - secondAntenna.Col
+
+							if rowDiff1*colDiff2 == rowDiff2*colDiff1 {
+								if (distance1 == 2*distance2 || distance1*2 == distance2) && onlySpecial {
+									uniqueAntinodes[Coordinate{Row: row, Col: col}] = struct{}{}
+								} else if !onlySpecial {
+									uniqueAntinodes[Coordinate{Row: row, Col: col}] = struct{}{}
+								}
+							}
+						}
+					}
+				}
+			}
+		}
+	}
+
+	return len(uniqueAntinodes)
+}

2024/gareth/day08/day08_test.go

@@ -0,0 +1,39 @@
+package day08
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1(`............
+........0...
+.....0......
+.......0....
+....0.......
+......A.....
+............
+............
+........A...
+.........A..
+............
+............`)
+	assert.Equal(t, 14, r)
+}
+
+func TestPart2(t *testing.T) {
+	r := Part2(`............
+........0...
+.....0......
+.......0....
+....0.......
+......A.....
+............
+............
+........A...
+.........A..
+............
+............`)
+	assert.Equal(t, 11387, r)
+}

2024/gareth/day08/input.txt

@@ -0,0 +1,50 @@
+........................E...j......W..........L...
+............................O........E.........L..
+..q......O...........l....................K.......
+............q...................HM......W.........
+................................1..H...........IW.
+....................5.............................
+..........k........M...wl............6............
+.....O.......w...k.....5.8..l......K.........o.6..
+.......k....w.........5.........R.....o........K..
+.....q..X..............j........E...I.........K...
+............O..........E........................H.
+................Mn.h2.w.p....................H....
+..................p.......a............j.....L....
+.....X...l.p.....................m.........W..6...
+..Xq................A..................R..m.......
+.........................i..........a..........R..
+...........u.....................a........I.....2.
+k..............A..n.........R.................o...
+................n.................Qo..............
+..........u.A.........h........2..................
+...5.......Y.....p...............iN...............
+1...x.....................i.......................
+........M..............2.....Qi...................
+...............................I..e...............
+......u......A...........m..........h.............
+.......1...........U.............Qm.......j.......
+.......X.......................................9..
+.....u........U.......Y...........................
+.............................h.e..................
+..................4....e......Q.....L....N........
+.1..................4.......................y8....
+.........Y................................8.N.....
+............P.0J...........3..........8y..........
+....V3P..........J................................
+............U..P...7x...........e.................
+....................J...............r...9.........
+.........0.V......Y...............................
+...............V.4................................
+..........V..........................n............
+..............v........7..........................
+...........U..........J.......7...................
+.....v........7..........................a........
+.......................................r..........
+...........0.......x................y.............
+............6..v.x.....................N..........
+...........P......................................
+........3.......................r......4..........
+..............3......................y............
+................................................9.
+.................................................9

2024/gareth/day09/day09.go

@@ -0,0 +1,104 @@
+package day09
+
+func Part1(input string) int {
+	files, gaps, lengthOfFinalFile := parseInput(input)
+	checksum := compactFiles(files, gaps, lengthOfFinalFile)
+	return checksum
+}
+
+func Part2(input string) int {
+	files, freeSpaces := parseInputPart2(input)
+	checksum := calculateChecksum(files, freeSpaces)
+	return checksum
+}
+
+func parseInput(input string) ([]int, []int, int) {
+	var files []int
+	var gaps []int
+	lengthOfFinalFile := 0
+	for i, char := range input {
+		if i%2 == 0 {
+			files = append(files, int(char-'0'))
+			lengthOfFinalFile += int(char - '0')
+		} else {
+			gaps = append(gaps, int(char-'0'))
+		}
+	}
+	return files, gaps, lengthOfFinalFile
+}
+
+func parseInputPart2(input string) ([][]int, [][]int) {
+	files, freeSpaces, position := [][]int{}, [][]int{}, 0
+	for index, char := range input {
+		length := int(char - '0')
+		if index%2 == 0 {
+			files = append(files, generateRange(position, position+length))
+		} else {
+			freeSpaces = append(freeSpaces, generateRange(position, position+length))
+		}
+		position += length
+	}
+	return files, freeSpaces
+}
+
+func compactFiles(files []int, gaps []int, lengthOfFinalFile int) int {
+	fileIndex := len(files) - 1
+	gapIndex := 0
+	position := files[0]
+	checksum := 0
+	fileID := files[0]
+
+	for lengthOfFinalFile != position {
+		// If there's a gap and a file to move then move the file
+		if gaps[gapIndex] > 0 && files[fileIndex] > 0 {
+			files[fileIndex]--
+			gaps[gapIndex]--
+			checksum += fileIndex * position
+			position++
+		}
+
+		// If this file is fully moved go to next file
+		if files[fileIndex] == 0 {
+			fileIndex--
+			fileID++
+		}
+
+		// Update gapIndex if this gap is filled
+		if gaps[gapIndex] == 0 {
+			gapIndex++
+			for f := 0; f < files[gapIndex]; f++ {
+				checksum += gapIndex * position
+				position++
+			}
+		}
+	}
+
+	return checksum
+}
+
+func generateRange(start, end int) []int {
+	rangeList := make([]int, end-start)
+	for i := range rangeList {
+		rangeList[i] = start + i
+	}
+	return rangeList
+}
+
+func calculateChecksum(files, freeSpaces [][]int) int {
+	checksum := 0
+	for fileIndex := len(files) - 1; fileIndex >= 0; fileIndex-- {
+		for spaceIndex := 0; spaceIndex < len(freeSpaces); spaceIndex++ {
+			if len(freeSpaces[spaceIndex]) >= len(files[fileIndex]) && files[fileIndex][0] > freeSpaces[spaceIndex][0] {
+				files[fileIndex] = freeSpaces[spaceIndex][:len(files[fileIndex])]
+				freeSpaces[spaceIndex] = freeSpaces[spaceIndex][len(files[fileIndex]):]
+			}
+		}
+	}
+
+	for fileID, file := range files {
+		for _, block := range file {
+			checksum += fileID * block
+		}
+	}
+	return checksum
+}

2024/gareth/day09/day09_test.go

@@ -0,0 +1,22 @@
+package day09
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1(`12345`)
+	assert.Equal(t, 60, r)
+}
+
+func TestPart1Long(t *testing.T) {
+	r := Part1(`2333133121414131402`)
+	assert.Equal(t, 1928, r)
+}
+
+func TestPart2(t *testing.T) {
+	r := Part2(`2333133121414131402`)
+	assert.Equal(t, 2858, r)
+}

2024/gareth/day10/day10.go

@@ -0,0 +1,141 @@
+package day10
+
+import (
+	"strings"
+)
+
+var directions = [][2]int{
+	{-1, 0},
+	{1, 0},
+	{0, -1},
+	{0, 1},
+}
+
+func Part1(input string) int {
+	grid := ParseInput(input)
+	return CalculateTotalTrailheadScore(grid)
+}
+
+func Part2(input string) int {
+	grid := ParseInput(input)
+	return CalculateTotalTrailheadRating(grid)
+}
+
+func ParseInput(input string) [][]int {
+	lines := strings.Split(strings.TrimSpace(input), "\n")
+	grid := make([][]int, len(lines))
+	for i, line := range lines {
+		grid[i] = make([]int, len(line))
+		for j, char := range line {
+			grid[i][j] = int(char - '0')
+		}
+	}
+	return grid
+}
+
+func IsValidPosition(x, y, rows, cols int) bool {
+	return x >= 0 && x < rows && y >= 0 && y < cols
+}
+
+func DFS(grid [][]int, x, y, prevHeight int, visited [][]bool, reached9 map[[2]int]bool) {
+	rows := len(grid)
+	cols := len(grid[0])
+	if !IsValidPosition(x, y, rows, cols) || visited[x][y] || grid[x][y] != prevHeight+1 {
+		return
+	}
+
+	if grid[x][y] == 9 {
+		reached9[[2]int{x, y}] = true
+		return
+	}
+
+	visited[x][y] = true
+	for _, dir := range directions {
+		nx, ny := x+dir[0], y+dir[1]
+		DFS(grid, nx, ny, grid[x][y], visited, reached9)
+	}
+	visited[x][y] = false
+}
+
+func CalculateTrailheadScore(grid [][]int, x, y int) int {
+	rows := len(grid)
+	cols := len(grid[0])
+	visited := make([][]bool, rows)
+	for i := range visited {
+		visited[i] = make([]bool, cols)
+	}
+
+	reached9 := make(map[[2]int]bool)
+	DFS(grid, x, y, -1, visited, reached9)
+	return len(reached9)
+}
+
+func DFSForRatings(grid [][]int, x, y, prevHeight int, visited [][]bool, trailCache map[[3]int]int) int {
+	rows := len(grid)
+	cols := len(grid[0])
+	if !IsValidPosition(x, y, rows, cols) || visited[x][y] || grid[x][y] != prevHeight+1 {
+		return 0
+	}
+
+	if grid[x][y] == 9 {
+		return 1
+	}
+
+	cacheKey := [3]int{x, y, grid[x][y]}
+	if count, exists := trailCache[cacheKey]; exists {
+		return count
+	}
+
+	visited[x][y] = true
+	totalTrails := 0
+	for _, dir := range directions {
+		nx, ny := x+dir[0], y+dir[1]
+		totalTrails += DFSForRatings(grid, nx, ny, grid[x][y], visited, trailCache)
+	}
+	visited[x][y] = false
+
+	trailCache[cacheKey] = totalTrails
+	return totalTrails
+}
+
+func CalculateTrailheadRating(grid [][]int, x, y int) int {
+	rows := len(grid)
+	cols := len(grid[0])
+	visited := make([][]bool, rows)
+	for i := range visited {
+		visited[i] = make([]bool, cols)
+	}
+
+	trailCache := make(map[[3]int]int)
+	return DFSForRatings(grid, x, y, -1, visited, trailCache)
+}
+
+func CalculateTotalTrailheadScore(grid [][]int) int {
+	rows := len(grid)
+	cols := len(grid[0])
+	totalScore := 0
+	for i := 0; i < rows; i++ {
+		for j := 0; j < cols; j++ {
+			if grid[i][j] == 0 {
+				score := CalculateTrailheadScore(grid, i, j)
+				totalScore += score
+			}
+		}
+	}
+	return totalScore
+}
+
+func CalculateTotalTrailheadRating(grid [][]int) int {
+	rows := len(grid)
+	cols := len(grid[0])
+	totalRating := 0
+	for i := 0; i < rows; i++ {
+		for j := 0; j < cols; j++ {
+			if grid[i][j] == 0 {
+				rating := CalculateTrailheadRating(grid, i, j)
+				totalRating += rating
+			}
+		}
+	}
+	return totalRating
+}

2024/gareth/day10/day10_test.go

@@ -0,0 +1,31 @@
+package day10
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1(`89010123
+78121874
+87430965
+96549874
+45678903
+32019012
+01329801
+10456732`)
+	assert.Equal(t, 36, r)
+}
+
+func TestPart2(t *testing.T) {
+	r := Part2(`89010123
+78121874
+87430965
+96549874
+45678903
+32019012
+01329801
+10456732`)
+	assert.Equal(t, 81, r)
+}

2024/gareth/day10/input.txt

@@ -0,0 +1,45 @@
+987123434330121232101001234730123456781067632
+876076576521010345692340349823212347892398701
+945087689432105676787659856714503210987445610
+332196576587654989801456787609654502376530923
+211543210298923215432321098128778901430121894
+300692340147210106523543210039569876589836765
+456781678236103267015693016543410231276745650
+576890549345234178106782187612320140345654321
+985098432100125089235493498109876056034765012
+834127102345456978340362569018765487123876678
+123236221976347869651251078729034398101985589
+014545340889298958707867897430120987012834432
+105965456770107843216950956541231276543124501
+896872378761016930345441019876501345678023670
+787901069654325321210332398545432330589012981
+107821543213034321089206787638901421432103210
+215430694102123475670115896129876548901210349
+126989780210014984308924925014578037654321458
+037878921001235675217833210123669123109452367
+549865438901045102346542106548754321278501476
+678954987432696201256430087239689870347699985
+230143006501787349961021298101236787656788014
+123272112981010458872787034010345691875107623
+054387623472129867763698125676210010961234510
+565694502561036789854567012980387121250129878
+676783411051045672343218763901296030343278569
+989872123432345891050109654812345145467303450
+012763094321056700891760345765432256958912341
+103450185789763211709851236876301967843211032
+814321276656854345612345654954101878701208983
+923434434565956745678036783063210989870345674
+874532345410345832989123192178981876781456564
+265101654323234901808765013265432185692387565
+103216765432101267814554323476501094501893474
+232109856321011876923601098789678923432102985
+343898707896540945498712367765672310567891078
+456789010987231234321203456894581455454986569
+556776125670102343100157654503490166303890432
+543895434894321765212348983212321876212761201
+432104898765010894301054581200110955211654300
+301256567656987105498765690341034567300563212
+434567430547896234787654785652123498456767843
+321798121032345375696543098743096567877854952
+210899021121036789781232143456787656928923761
+326765430110145678710123232109876543210010890

2024/gareth/day11/day11.go

@@ -0,0 +1,89 @@
+package day11
+
+import (
+	"strconv"
+	"strings"
+)
+
+func Part1(input string) int {
+	stones := ParseInput(input)
+	return len(blinkTimes(stones, 25))
+}
+
+func Part2(input string) int {
+	stones := ParseInput(input)
+	return getNumStones(stones, 75)
+}
+
+func ParseInput(input string) []int {
+	strStones := strings.Split(strings.TrimSpace(input), " ")
+	stones := make([]int, 0, len(strStones))
+	for _, s := range strStones {
+		num, _ := strconv.Atoi(s)
+		stones = append(stones, num)
+	}
+	return stones
+}
+
+// Part 1 initial thought of recursion
+func blinkTimes(stones []int, times int) []int {
+	if times <= 0 {
+		return stones
+	}
+	result := blink(stones)
+	return blinkTimes(result, times-1)
+}
+
+func blink(stones []int) []int {
+	result := make([]int, 0)
+	for _, stone := range stones {
+		strStone := strconv.Itoa(stone)
+		if stone == 0 {
+			result = append(result, 1)
+		} else if len(strStone)%2 == 0 {
+			mid := len(strStone) / 2
+			firstHalf, _ := strconv.Atoi(strStone[:mid])
+			secondHalf, _ := strconv.Atoi(strStone[mid:])
+			result = append(result, firstHalf, secondHalf)
+		} else {
+			result = append(result, stone*2024)
+		}
+	}
+	return result
+}
+
+// Part 2 with maps since blinkTimes(75) would set my computer on fire
+func getNumStones(s []int, times int) int {
+	stoneMap := make(map[int]int)
+	for _, stone := range s {
+		stoneMap[stone] = stoneMap[stone] + 1
+	}
+
+	for i := 0; i < times; i++ {
+		stoneMap2 := make(map[int]int)
+		for stone, count := range stoneMap {
+			stones := make([]int, 0)
+			strStone := strconv.Itoa(stone)
+			if stone == 0 {
+				stones = append(stones, 1)
+			} else if len(strStone)%2 == 0 {
+				mid := len(strStone) / 2
+				firstHalf, _ := strconv.Atoi(strStone[:mid])
+				secondHalf, _ := strconv.Atoi(strStone[mid:])
+				stones = append(stones, firstHalf, secondHalf)
+			} else {
+				stones = append(stones, stone*2024)
+			}
+			for _, newStone := range stones {
+				stoneMap2[newStone] = stoneMap2[newStone] + count
+			}
+		}
+		stoneMap = stoneMap2
+	}
+
+	result := 0
+	for _, count := range stoneMap {
+		result += count
+	}
+	return result
+}

2024/gareth/day11/day11_test.go

@@ -0,0 +1,12 @@
+package day11
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1(`125 17`)
+	assert.Equal(t, 55312, r)
+}

2024/gareth/day11/input.txt

@@ -0,0 +1 @@
+965842 9159 3372473 311 0 6 86213 48

2024/gareth/day13/day13.go

@@ -0,0 +1,76 @@
+package day13
+
+import (
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+type ClawMachine struct {
+	Ax, Ay int
+	Bx, By int
+	Px, Py int
+}
+
+func Part1(input string) int {
+	clawMachines := parseInput(input)
+	total := 0
+	for _, c := range clawMachines {
+		x, y := solveSimEquations(c.Ax, c.Bx, c.Px, c.Ay, c.By, c.Py)
+		total += x*3 + y
+	}
+	return total
+}
+
+func Part2(input string) int {
+	clawMachines := parseInput(input)
+	total := 0
+	for _, c := range clawMachines {
+		prizeX, prizeY := c.Px+10000000000000, c.Py+10000000000000
+		det, x, y := c.Ax*c.By-c.Bx*c.Ay, prizeX*c.By-c.Bx*prizeY, c.Ax*prizeY-prizeX*c.Ay
+		if det != 0 && x == (x/det)*det && y == (y/det)*det {
+			total += (x/det)*3 + (y / det)
+		}
+	}
+
+	return total
+}
+
+func parseInput(input string) []ClawMachine {
+	clawMachines := strings.Split(strings.TrimSpace(input), "\n\n")
+	output := make([]ClawMachine, 0, len(clawMachines))
+	for _, c := range clawMachines {
+		var clawMachine ClawMachine
+		line := strings.Split(strings.TrimSpace(c), "\n")
+
+		re := regexp.MustCompile(`X\+(\d+), Y\+(\d+)`)
+		matches := re.FindStringSubmatch(line[0])
+		clawMachine.Ax, _ = strconv.Atoi(matches[1])
+		clawMachine.Ay, _ = strconv.Atoi(matches[2])
+
+		matches = re.FindStringSubmatch(line[1])
+		clawMachine.Bx, _ = strconv.Atoi(matches[1])
+		clawMachine.By, _ = strconv.Atoi(matches[2])
+
+		re = regexp.MustCompile(`X=(\d+), Y=(\d+)`)
+		matches = re.FindStringSubmatch(line[2])
+		clawMachine.Px, _ = strconv.Atoi(matches[1])
+		clawMachine.Py, _ = strconv.Atoi(matches[2])
+
+		output = append(output, clawMachine)
+	}
+	return output
+}
+
+func solveSimEquations(a1, b1, c1, a2, b2, c2 int) (int, int) {
+	det := a1*b2 - a2*b1
+	if det == 0 || (c1*b2-c2*b1)%det != 0 || (a1*c2-a2*c1)%det != 0 {
+		return 0, 0
+	}
+	x := (c1*b2 - c2*b1) / det
+	y := (a1*c2 - a2*c1) / det
+	if x < 0 || x > 100 || y < 0 || y > 100 {
+		return 0, 0
+	}
+	return x, y
+}

2024/gareth/day13/day13_test.go

@@ -0,0 +1,45 @@
+package day13
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1(`Button A: X+94, Y+34
+Button B: X+22, Y+67
+Prize: X=8400, Y=5400
+
+Button A: X+26, Y+66
+Button B: X+67, Y+21
+Prize: X=12748, Y=12176
+
+Button A: X+17, Y+86
+Button B: X+84, Y+37
+Prize: X=7870, Y=6450
+
+Button A: X+69, Y+23
+Button B: X+27, Y+71
+Prize: X=18641, Y=10279`)
+	assert.Equal(t, 480, r)
+}
+
+func TestPart2(t *testing.T) {
+	r := Part2(`Button A: X+94, Y+34
+Button B: X+22, Y+67
+Prize: X=8400, Y=5400
+
+Button A: X+26, Y+66
+Button B: X+67, Y+21
+Prize: X=12748, Y=12176
+
+Button A: X+17, Y+86
+Button B: X+84, Y+37
+Prize: X=7870, Y=6450
+
+Button A: X+69, Y+23
+Button B: X+27, Y+71
+Prize: X=18641, Y=10279`)
+	assert.Equal(t, 0, r)
+}

2024/gareth/day14/day14.go

@@ -0,0 +1,172 @@
+package day14
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+type Robot struct {
+	px, py int // position
+	vx, vy int // velocity
+}
+
+func Part1(input string) int {
+	// Parse the input
+	lines := strings.Split(input, "\n")
+	var robots []Robot
+	for _, line := range lines {
+		robot := ParseRobot(line)
+		robots = append(robots, robot)
+	}
+
+	// Define grid size
+	gridWidth := 101
+	gridHeight := 103
+
+	// Update robot positions for 100 seconds
+	for i := 0; i < 100; i++ {
+		for j := range robots {
+			robots[j].UpdatePosition(gridWidth, gridHeight)
+		}
+	}
+
+	// Count the robots in each quadrant
+	q1, q2, q3, q4 := CountRobotsInQuadrants(robots, gridWidth, gridHeight)
+	fmt.Printf("Quadrant counts: Q1=%d, Q2=%d, Q3=%d, Q4=%d\n", q1, q2, q3, q4)
+
+	// Calculate the safety factor
+	safetyFactor := CalculateSafetyFactor(q1, q2, q3, q4)
+	fmt.Printf("Safety Factor: %d\n", safetyFactor)
+	return safetyFactor
+}
+
+func Part2(input string) int {
+	// Parse the input
+	lines := strings.Split(input, "\n")
+	var robots []Robot
+	for _, line := range lines {
+		robot := ParseRobot(line)
+		robots = append(robots, robot)
+	}
+
+	// Define grid size
+	gridWidth := 101
+	gridHeight := 103
+
+	// Update robot positions for 100 seconds
+	for i := 0; i < 6285; i++ {
+		for j := range robots {
+			robots[j].UpdatePosition(gridWidth, gridHeight)
+		}
+	}
+
+	DisplayGrid(robots, gridWidth, gridHeight)
+	return 2
+}
+
+// ParseRobot takes a line of input and converts it to a Robot struct
+func ParseRobot(line string) Robot {
+	parts := strings.Split(line, " ")
+	posParts := strings.Split(parts[0][2:], ",") // Extract p=x,y and split
+	velParts := strings.Split(parts[1][2:], ",") // Extract v=x,y and split
+
+	px, _ := strconv.Atoi(posParts[0])
+	py, _ := strconv.Atoi(posParts[1])
+	vx, _ := strconv.Atoi(velParts[0])
+	vy, _ := strconv.Atoi(velParts[1])
+
+	return Robot{px, py, vx, vy}
+}
+
+// UpdatePosition updates the position of a robot, considering the wrap-around
+func (r *Robot) UpdatePosition(gridWidth, gridHeight int) {
+	r.px = (r.px + r.vx + gridWidth) % gridWidth
+	r.py = (r.py + r.vy + gridHeight) % gridHeight
+}
+
+// CountRobotsInQuadrants counts the number of robots in each of the four quadrants
+func CountRobotsInQuadrants(robots []Robot, width, height int) (int, int, int, int) {
+	midX := width / 2
+	midY := height / 2
+
+	q1, q2, q3, q4 := 0, 0, 0, 0
+
+	for _, r := range robots {
+		if r.px == midX || r.py == midY {
+			// Skip robots on the middle line
+			continue
+		}
+		if r.px < midX && r.py < midY {
+			q1++ // Top-left quadrant
+		} else if r.px > midX && r.py < midY {
+			q2++ // Top-right quadrant
+		} else if r.px < midX && r.py > midY {
+			q3++ // Bottom-left quadrant
+		} else if r.px > midX && r.py > midY {
+			q4++ // Bottom-right quadrant
+		}
+	}
+
+	return q1, q2, q3, q4
+}
+
+// CalculateSafetyFactor multiplies the number of robots in each quadrant
+func CalculateSafetyFactor(q1, q2, q3, q4 int) int {
+	return q1 * q2 * q3 * q4
+}
+
+// DisplayGrid displays the current state of the grid
+func DisplayGrid(robots []Robot, width, height int) {
+	grid := make([][]rune, height)
+	for i := range grid {
+		grid[i] = make([]rune, width)
+		for j := range grid[i] {
+			grid[i][j] = '.'
+		}
+	}
+	for _, r := range robots {
+		grid[r.py][r.px] = '#'
+	}
+	for _, row := range grid {
+		fmt.Println(string(row))
+	}
+}
+
+// FindEasterEgg determines the fewest number of seconds that must elapse for the robots to display the Easter egg
+func FindEasterEgg(robots []Robot, width, height int) int {
+	smallestArea := width * height
+	bestTime := 0
+	for t := 6285; t < 6286; t++ { // Large upper limit to search
+		// Update robot positions
+		for i := range robots {
+			robots[i].UpdatePosition(width, height)
+		}
+		// Calculate the bounding box of all robot positions
+		minX, minY := width, height
+		maxX, maxY := 0, 0
+		for _, r := range robots {
+			if r.px < minX {
+				minX = r.px
+			}
+			if r.px > maxX {
+				maxX = r.px
+			}
+			if r.py < minY {
+				minY = r.py
+			}
+			if r.py > maxY {
+				maxY = r.py
+			}
+		}
+
+		area := (maxX - minX + 1) * (maxY - minY + 1)
+		if area < smallestArea {
+			smallestArea = area
+			bestTime = t + 1
+			fmt.Printf("Time: %d\n", bestTime)
+			DisplayGrid(robots, width, height)
+		}
+	}
+	return bestTime
+}

2024/gareth/day14/day14_test.go

@@ -0,0 +1,23 @@
+package day14
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1(`p=0,4 v=3,-3
+p=6,3 v=-1,-3
+p=10,3 v=-1,2
+p=2,0 v=2,-1
+p=0,0 v=1,3
+p=3,0 v=-2,-2
+p=7,6 v=-1,-3
+p=3,0 v=-1,-2
+p=9,3 v=2,3
+p=7,3 v=-1,2
+p=2,4 v=2,-3
+p=9,5 v=-3,-3`)
+	assert.Equal(t, 12, r)
+}

2024/gareth/day14/input.txt

@@ -0,0 +1,500 @@
+p=38,76 v=-61,88
+p=28,22 v=-43,-40
+p=76,78 v=-98,87
+p=39,56 v=10,96
+p=38,0 v=79,-15
+p=6,44 v=-88,53
+p=40,80 v=-83,31
+p=11,2 v=28,-31
+p=41,91 v=-86,-48
+p=8,55 v=-81,95
+p=77,19 v=3,-90
+p=94,73 v=-59,42
+p=51,53 v=35,48
+p=12,52 v=72,6
+p=62,61 v=96,47
+p=78,62 v=47,-57
+p=39,54 v=53,50
+p=1,43 v=-64,-46
+p=9,21 v=28,-36
+p=92,79 v=67,-47
+p=6,15 v=-58,-48
+p=54,67 v=99,-38
+p=96,99 v=-55,30
+p=90,44 v=-10,-8
+p=23,84 v=20,77
+p=5,84 v=28,88
+p=55,20 v=-31,-36
+p=84,43 v=-37,-41
+p=12,75 v=-38,30
+p=39,2 v=-12,-29
+p=74,14 v=56,-81
+p=63,53 v=22,-53
+p=51,28 v=9,-90
+p=53,72 v=48,-61
+p=33,42 v=-43,23
+p=75,18 v=-89,-37
+p=38,83 v=27,38
+p=69,31 v=61,80
+p=73,3 v=-45,74
+p=39,29 v=92,17
+p=78,45 v=-23,-47
+p=48,59 v=-57,38
+p=2,41 v=-71,-93
+p=30,13 v=36,-82
+p=37,57 v=25,13
+p=51,73 v=56,-98
+p=76,78 v=38,91
+p=56,49 v=22,55
+p=34,47 v=10,84
+p=83,93 v=81,-16
+p=14,70 v=71,-50
+p=97,74 v=-4,70
+p=33,8 v=93,-35
+p=39,70 v=-2,19
+p=94,63 v=20,44
+p=86,4 v=-33,19
+p=17,67 v=26,44
+p=39,2 v=-70,-25
+p=47,56 v=-79,-55
+p=5,98 v=86,-75
+p=53,21 v=79,-89
+p=53,85 v=61,73
+p=46,32 v=66,54
+p=30,75 v=49,-73
+p=44,81 v=-61,-69
+p=82,66 v=-72,-6
+p=89,76 v=-13,98
+p=57,87 v=30,36
+p=12,41 v=59,-40
+p=36,56 v=10,-61
+p=60,80 v=48,39
+p=50,75 v=-44,42
+p=66,56 v=-93,-1
+p=57,96 v=83,-79
+p=98,88 v=-15,-16
+p=0,63 v=59,44
+p=90,27 v=29,-40
+p=21,60 v=-86,2
+p=85,13 v=11,61
+p=92,77 v=24,-34
+p=16,24 v=80,4
+p=47,8 v=-79,-49
+p=1,28 v=-82,-48
+p=80,55 v=6,-72
+p=60,94 v=-67,-15
+p=83,90 v=-98,78
+p=3,75 v=46,-66
+p=93,40 v=15,11
+p=52,37 v=48,7
+p=23,4 v=-47,25
+p=46,43 v=57,-98
+p=23,12 v=-98,-36
+p=11,42 v=-83,50
+p=80,33 v=25,54
+p=59,95 v=-1,36
+p=55,67 v=-44,-60
+p=90,80 v=83,-39
+p=57,61 v=-1,96
+p=51,79 v=31,39
+p=28,89 v=85,35
+p=12,98 v=28,-80
+p=25,61 v=-95,-50
+p=77,84 v=-37,78
+p=50,80 v=66,89
+p=93,32 v=-15,-45
+p=30,4 v=-96,-29
+p=81,95 v=14,-66
+p=23,3 v=42,-16
+p=33,69 v=-96,-10
+p=28,23 v=-43,68
+p=77,25 v=-45,-41
+p=27,96 v=-69,-32
+p=41,15 v=-53,-35
+p=66,81 v=-22,5
+p=5,15 v=13,-95
+p=88,1 v=-59,-26
+p=48,41 v=16,-19
+p=88,75 v=33,46
+p=21,9 v=-64,-86
+p=36,4 v=-16,-95
+p=68,22 v=-5,65
+p=8,43 v=-34,46
+p=71,68 v=-49,-59
+p=37,92 v=-48,-18
+p=59,43 v=-21,-10
+p=69,31 v=30,58
+p=90,77 v=46,-74
+p=42,42 v=-76,20
+p=58,34 v=78,55
+p=18,10 v=33,2
+p=23,92 v=45,-69
+p=23,45 v=-32,27
+p=63,50 v=39,-96
+p=8,72 v=-34,85
+p=22,102 v=-69,26
+p=73,14 v=-45,-38
+p=65,54 v=-51,68
+p=99,29 v=-16,67
+p=29,60 v=15,-19
+p=85,76 v=-54,80
+p=21,23 v=-3,-47
+p=9,37 v=94,-44
+p=99,77 v=48,80
+p=48,47 v=18,56
+p=26,61 v=36,-57
+p=80,58 v=56,90
+p=37,6 v=53,-90
+p=47,15 v=53,60
+p=4,79 v=70,52
+p=35,8 v=31,12
+p=18,8 v=25,-30
+p=80,38 v=33,45
+p=23,26 v=-69,61
+p=10,35 v=-78,-96
+p=53,17 v=48,-34
+p=24,45 v=72,-2
+p=65,75 v=-1,-38
+p=5,72 v=-49,39
+p=63,87 v=-27,-16
+p=0,46 v=-34,73
+p=14,46 v=55,-15
+p=28,70 v=45,92
+p=29,30 v=89,10
+p=98,31 v=-46,-89
+p=1,85 v=-77,82
+p=30,79 v=-43,28
+p=29,70 v=-81,65
+p=51,97 v=13,-25
+p=76,19 v=-23,18
+p=36,83 v=-17,91
+p=52,34 v=-39,-98
+p=35,46 v=-43,55
+p=97,13 v=-99,-26
+p=40,26 v=27,13
+p=18,38 v=89,57
+p=45,57 v=-79,-52
+p=86,76 v=-54,-64
+p=12,38 v=28,55
+p=6,56 v=-86,97
+p=85,100 v=-41,-22
+p=4,34 v=28,-95
+p=89,33 v=-4,-73
+p=82,20 v=-33,-15
+p=98,5 v=31,43
+p=85,81 v=73,88
+p=13,42 v=-90,-49
+p=93,60 v=-91,-64
+p=56,7 v=-5,64
+p=9,5 v=45,76
+p=61,4 v=74,86
+p=23,53 v=-7,3
+p=89,21 v=-38,-74
+p=13,44 v=-86,10
+p=96,62 v=-11,96
+p=5,98 v=-22,3
+p=26,26 v=-73,-93
+p=52,95 v=-5,42
+p=62,50 v=-57,-7
+p=11,2 v=41,-77
+p=23,73 v=-2,-97
+p=34,77 v=-47,-71
+p=91,58 v=99,43
+p=41,74 v=-53,42
+p=75,102 v=55,-81
+p=89,95 v=30,8
+p=76,28 v=-80,12
+p=82,27 v=-43,77
+p=62,63 v=-97,21
+p=94,73 v=-58,14
+p=13,35 v=-47,-46
+p=56,0 v=61,25
+p=94,39 v=11,8
+p=96,53 v=77,-53
+p=23,78 v=-43,-7
+p=24,51 v=-74,-86
+p=77,33 v=60,8
+p=84,71 v=-76,19
+p=78,96 v=82,3
+p=61,92 v=-58,-30
+p=9,75 v=94,-34
+p=89,13 v=7,-26
+p=16,67 v=-25,96
+p=95,43 v=-25,-54
+p=39,62 v=18,-40
+p=41,36 v=17,-65
+p=2,42 v=86,-10
+p=29,54 v=55,-2
+p=51,74 v=-44,92
+p=75,40 v=-36,-96
+p=60,15 v=-93,-84
+p=44,33 v=44,8
+p=88,51 v=85,-94
+p=26,60 v=43,62
+p=94,22 v=-81,-98
+p=4,50 v=-94,-96
+p=87,47 v=-55,3
+p=15,80 v=33,-14
+p=4,48 v=-24,-48
+p=57,36 v=-18,-98
+p=87,12 v=76,63
+p=53,17 v=-91,-81
+p=17,96 v=53,6
+p=91,40 v=95,-46
+p=23,28 v=-55,55
+p=81,7 v=-54,16
+p=62,102 v=-97,-77
+p=42,31 v=80,-41
+p=99,53 v=-72,57
+p=17,29 v=98,58
+p=24,57 v=84,-48
+p=98,101 v=-33,-30
+p=77,82 v=-36,-25
+p=44,8 v=83,18
+p=27,35 v=-27,16
+p=95,58 v=-29,52
+p=87,40 v=60,-91
+p=66,1 v=17,24
+p=17,11 v=63,21
+p=67,77 v=-23,-11
+p=91,30 v=-59,64
+p=22,34 v=7,84
+p=55,90 v=48,29
+p=45,45 v=31,50
+p=12,34 v=65,-86
+p=40,48 v=18,-1
+p=39,42 v=75,11
+p=28,27 v=63,-49
+p=93,44 v=-81,3
+p=8,78 v=-51,-15
+p=6,37 v=-51,-42
+p=73,89 v=-45,23
+p=2,80 v=-23,50
+p=93,37 v=55,-44
+p=16,52 v=-54,35
+p=15,17 v=-33,74
+p=84,37 v=-6,-48
+p=13,47 v=50,-48
+p=88,34 v=-79,-39
+p=16,68 v=50,94
+p=20,78 v=-99,29
+p=100,20 v=77,64
+p=79,2 v=-91,30
+p=52,0 v=-95,-86
+p=4,84 v=79,35
+p=13,74 v=19,-66
+p=57,55 v=-9,-63
+p=21,30 v=19,-94
+p=50,37 v=-66,4
+p=9,56 v=94,95
+p=91,59 v=55,-65
+p=77,15 v=34,-33
+p=5,100 v=81,-26
+p=26,96 v=-34,83
+p=36,64 v=-44,94
+p=37,65 v=-70,51
+p=74,6 v=25,-93
+p=33,78 v=-17,-48
+p=0,33 v=-6,-39
+p=3,55 v=-11,96
+p=32,19 v=-8,-33
+p=60,53 v=-5,-55
+p=75,62 v=56,45
+p=74,71 v=12,-66
+p=50,74 v=-53,91
+p=24,90 v=-19,-57
+p=58,53 v=31,5
+p=13,95 v=-33,20
+p=30,98 v=41,-70
+p=54,78 v=71,-43
+p=78,73 v=26,53
+p=66,30 v=-49,60
+p=81,87 v=-24,-15
+p=28,27 v=-31,11
+p=75,18 v=-89,10
+p=76,82 v=-89,-66
+p=44,65 v=-17,98
+p=17,42 v=-7,-5
+p=75,92 v=-54,32
+p=95,10 v=-28,-76
+p=20,36 v=-22,-62
+p=100,0 v=11,21
+p=37,39 v=5,-46
+p=80,50 v=-63,7
+p=77,28 v=-98,2
+p=61,41 v=-1,-40
+p=88,78 v=95,-17
+p=83,1 v=47,-30
+p=47,67 v=-30,-9
+p=14,81 v=-38,82
+p=40,97 v=-31,76
+p=76,27 v=37,-70
+p=25,73 v=80,35
+p=88,84 v=-33,77
+p=60,71 v=83,35
+p=14,93 v=-3,-25
+p=40,45 v=-35,4
+p=34,35 v=15,19
+p=87,100 v=90,-66
+p=20,90 v=-42,-68
+p=90,44 v=50,-52
+p=43,77 v=31,89
+p=99,81 v=33,-12
+p=28,35 v=58,-37
+p=37,52 v=57,6
+p=48,65 v=-66,23
+p=63,21 v=39,-35
+p=91,77 v=-15,-70
+p=27,28 v=93,-94
+p=18,61 v=-99,38
+p=56,36 v=-98,81
+p=90,75 v=-72,-67
+p=86,21 v=-13,-46
+p=20,88 v=89,-74
+p=17,41 v=-82,-98
+p=28,65 v=45,-72
+p=85,15 v=35,41
+p=39,43 v=-2,-36
+p=93,72 v=-94,91
+p=90,73 v=-64,77
+p=83,43 v=-94,-99
+p=50,59 v=-49,51
+p=58,25 v=13,-36
+p=25,102 v=-44,-54
+p=100,86 v=16,-23
+p=45,42 v=21,-90
+p=9,29 v=-13,18
+p=24,41 v=1,-47
+p=69,33 v=-58,55
+p=80,52 v=52,-2
+p=82,77 v=82,-11
+p=86,78 v=-41,-69
+p=89,58 v=69,-13
+p=12,91 v=-55,-65
+p=69,40 v=-93,59
+p=8,26 v=2,19
+p=21,47 v=19,3
+p=38,20 v=25,-83
+p=20,99 v=54,31
+p=20,74 v=-14,-30
+p=51,83 v=-40,24
+p=61,30 v=-27,-94
+p=84,19 v=-28,69
+p=28,33 v=-65,3
+p=58,91 v=-93,-18
+p=33,78 v=22,92
+p=86,53 v=63,-43
+p=53,79 v=-26,-42
+p=83,16 v=94,56
+p=21,0 v=-64,-35
+p=48,80 v=-97,79
+p=62,18 v=29,71
+p=17,13 v=-69,-36
+p=1,93 v=19,75
+p=7,75 v=41,93
+p=65,61 v=-45,65
+p=56,71 v=92,-63
+p=71,102 v=-53,-21
+p=64,79 v=96,49
+p=40,13 v=-74,-84
+p=28,71 v=93,91
+p=43,68 v=-39,-6
+p=10,40 v=63,55
+p=73,0 v=-97,-82
+p=26,38 v=85,-27
+p=27,94 v=36,-79
+p=1,99 v=-82,-30
+p=66,96 v=-23,31
+p=78,21 v=96,16
+p=10,93 v=-51,-76
+p=76,87 v=78,80
+p=13,20 v=-38,68
+p=31,42 v=-43,5
+p=56,10 v=-53,-33
+p=76,61 v=34,-4
+p=73,2 v=-36,74
+p=93,83 v=15,-19
+p=76,50 v=20,-51
+p=27,53 v=36,-51
+p=93,97 v=50,72
+p=59,22 v=87,21
+p=95,22 v=-29,66
+p=56,35 v=79,10
+p=60,38 v=17,-94
+p=67,41 v=-5,6
+p=97,71 v=-73,35
+p=26,10 v=-73,74
+p=74,71 v=5,64
+p=36,91 v=84,-17
+p=38,91 v=67,33
+p=19,64 v=41,-9
+p=89,15 v=-59,66
+p=5,94 v=94,-27
+p=92,21 v=7,-87
+p=87,64 v=-28,-5
+p=22,6 v=-95,25
+p=59,42 v=-51,-7
+p=50,95 v=88,29
+p=59,91 v=73,-21
+p=52,42 v=-75,56
+p=10,39 v=-30,7
+p=88,79 v=29,-62
+p=31,89 v=-21,-82
+p=43,60 v=4,52
+p=2,76 v=-68,-15
+p=13,71 v=-38,97
+p=93,38 v=1,-95
+p=53,99 v=10,16
+p=94,72 v=-98,30
+p=1,3 v=37,-82
+p=68,78 v=55,18
+p=1,78 v=42,-7
+p=80,84 v=52,-26
+p=75,46 v=-87,-20
+p=71,27 v=95,-39
+p=90,18 v=73,11
+p=99,3 v=62,52
+p=39,88 v=-80,-93
+p=85,32 v=69,-40
+p=72,23 v=-28,-75
+p=22,59 v=98,-7
+p=69,76 v=12,93
+p=56,59 v=30,50
+p=80,92 v=-49,-80
+p=4,40 v=-77,-50
+p=90,60 v=40,-28
+p=6,79 v=9,56
+p=63,47 v=57,-59
+p=33,62 v=22,37
+p=74,27 v=78,70
+p=26,101 v=-43,-49
+p=1,24 v=-29,-38
+p=73,90 v=56,79
+p=5,90 v=-20,-75
+p=16,35 v=94,8
+p=96,93 v=4,58
+p=61,43 v=4,4
+p=13,68 v=76,94
+p=5,29 v=86,-95
+p=32,81 v=39,-85
+p=94,42 v=-37,55
+p=80,20 v=60,22
+p=43,94 v=57,-19
+p=93,4 v=51,-26
+p=12,4 v=62,-58
+p=87,74 v=-98,-64
+p=81,41 v=-26,69
+p=30,54 v=-30,-13
+p=73,4 v=21,-30
+p=68,35 v=-49,-44
+p=47,2 v=19,-70
+p=92,100 v=33,79
+p=81,11 v=73,-83
+p=46,75 v=-62,-69
+p=48,56 v=-13,-56
+p=7,84 v=15,30
+p=92,10 v=28,69
+p=15,31 v=-87,61
+p=95,0 v=33,79
+p=3,61 v=-37,-50
+p=73,95 v=96,20

2024/gareth/day18/day18.go

@@ -0,0 +1,156 @@
+package day18
+
+import (
+	"container/heap"
+	"strconv"
+	"strings"
+)
+
+type Point struct {
+	x, y int
+}
+
+// Item represents a node in the priority queue.
+type Item struct {
+	point    Point
+	distance int
+	index    int
+}
+
+func Part1(input string) int {
+	grid := parseInput(input, 1024)
+	_, distance := dijkstra(grid)
+	return distance
+}
+
+func Part2(input string) int {
+	lines := strings.Split(strings.TrimSpace(input), "\n")
+	numLines := len(lines)
+	for i := 1; i <= numLines; i++ {
+		grid := parseInput(input, i)
+		_, distance := dijkstra(grid)
+		if distance == -1 {
+			println(lines[i-1])
+			return 2
+		}
+	}
+	return -1
+}
+
+func parseInput(input string, upToLine int) [][]rune {
+	grid := make([][]rune, 71)
+	for i := range grid {
+		grid[i] = make([]rune, 71)
+		for j := range grid[i] {
+			grid[i][j] = '.'
+		}
+	}
+
+	lines := strings.Split(strings.TrimSpace(input), "\n")
+
+	for index, line := range lines {
+		if index == upToLine {
+			break
+		}
+		cords := strings.Split(strings.TrimSpace(line), ",")
+		x, _ := strconv.Atoi(cords[0])
+		y, _ := strconv.Atoi(cords[1])
+		grid[x][y] = '#'
+	}
+	return grid
+}
+
+// PriorityQueue implements a priority queue for Dijkstra's algorithm.
+type PriorityQueue []*Item
+
+func (pq PriorityQueue) Len() int { return len(pq) }
+func (pq PriorityQueue) Less(i, j int) bool {
+	return pq[i].distance < pq[j].distance
+}
+func (pq PriorityQueue) Swap(i, j int) {
+	pq[i], pq[j] = pq[j], pq[i]
+	pq[i].index = i
+	pq[j].index = j
+}
+
+func (pq *PriorityQueue) Push(x interface{}) {
+	n := len(*pq)
+	item := x.(*Item)
+	item.index = n
+	*pq = append(*pq, item)
+}
+
+func (pq *PriorityQueue) Pop() interface{} {
+	old := *pq
+	n := len(old)
+	item := old[n-1]
+	item.index = -1
+	*pq = old[0 : n-1]
+	return item
+}
+
+func isValid(grid [][]rune, x, y int) bool {
+	return x >= 0 && x < len(grid) && y >= 0 && y < len(grid[0]) && grid[x][y] == '.'
+}
+
+func dijkstra(grid [][]rune) ([][]rune, int) {
+	directions := []Point{{0, 1}, {1, 0}, {0, -1}, {-1, 0}}
+	rows, cols := len(grid), len(grid[0])
+
+	// Validate start and end points
+	if grid[0][0] != '.' || grid[rows-1][cols-1] != '.' {
+		return grid, -1 // No path if start or end is not valid
+	}
+
+	dist := make([][]int, rows)
+	for i := range dist {
+		dist[i] = make([]int, cols)
+		for j := range dist[i] {
+			dist[i][j] = 1 << 30
+		}
+	}
+
+	pq := &PriorityQueue{}
+	heap.Init(pq)
+	heap.Push(pq, &Item{point: Point{0, 0}, distance: 0})
+	dist[0][0] = 0
+
+	path := make([][]Point, rows)
+	for i := range path {
+		path[i] = make([]Point, cols)
+	}
+
+	for pq.Len() > 0 {
+		item := heap.Pop(pq).(*Item)
+		x, y := item.point.x, item.point.y
+		if x == rows-1 && y == cols-1 {
+			break
+		}
+		for _, dir := range directions {
+			nx, ny := x+dir.x, y+dir.y
+			if isValid(grid, nx, ny) {
+				newDist := dist[x][y] + 1
+				if newDist < dist[nx][ny] {
+					dist[nx][ny] = newDist
+					heap.Push(pq, &Item{point: Point{nx, ny}, distance: newDist})
+					path[nx][ny] = Point{x, y}
+				}
+			}
+		}
+	}
+
+	// Check if no path exists
+	if dist[rows-1][cols-1] == 1<<30 {
+		return grid, -1 // No path found
+	}
+
+	// Reconstruct the path
+	x, y := rows-1, cols-1
+	for x != 0 || y != 0 {
+		grid[x][y] = 'O'
+		x, y = path[x][y].x, path[x][y].y
+	}
+	grid[0][0] = 'O'
+
+	return grid, dist[rows-1][cols-1]
+}

2024/gareth/day18/day18_test.go

@@ -0,0 +1,65 @@
+package day18
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1(`5,4
+4,2
+4,5
+3,0
+2,1
+6,3
+2,4
+1,5
+0,6
+3,3
+2,6
+5,1
+1,2
+5,5
+2,5
+6,5
+1,4
+0,4
+6,4
+1,1
+6,1
+1,0
+0,5
+1,6
+2,0`)
+	assert.Equal(t, 22, r)
+}
+
+func TestPart2(t *testing.T) {
+	r := Part2(`5,4
+4,2
+4,5
+3,0
+2,1
+6,3
+2,4
+1,5
+0,6
+3,3
+2,6
+5,1
+1,2
+5,5
+2,5
+6,5
+1,4
+0,4
+6,4
+1,1
+6,1
+1,0
+0,5
+1,6
+2,0`)
+	assert.Equal(t, 0, r)
+}

2024/gareth/day19/day19.go

@@ -0,0 +1,90 @@
+package day19
+
+import (
+	"strings"
+)
+
+func Part1(input string) int {
+	towelPatterns, designs := parseInput(input)
+	result := countPossibleDesigns(towelPatterns, designs)
+	return result
+}
+
+func Part2(input string) int {
+	towelPatterns, designs := parseInput(input)
+	result := totalArrangements(towelPatterns, designs)
+	return result
+}
+
+func parseInput(input string) ([]string, []string) {
+	parts := strings.SplitN(input, "\n\n", 2)
+	towels := strings.Split(strings.ReplaceAll(parts[0], " ", ""), ",")
+	patterns := strings.Split(strings.TrimSpace(parts[1]), "\n")
+	return towels, patterns
+}
+
+func countPossibleDesigns(towelPatterns []string, designs []string) int {
+	memo := make(map[string]bool)
+	count := 0
+
+	for _, design := range designs {
+		if canConstruct(design, towelPatterns, memo) {
+			count++
+		}
+	}
+
+	return count
+}
+
+func canConstruct(design string, patterns []string, memo map[string]bool) bool {
+	if design == "" {
+		return true
+	}
+	if val, found := memo[design]; found {
+		return val
+	}
+
+	for _, pattern := range patterns {
+		if strings.HasPrefix(design, pattern) {
+			remaining := design[len(pattern):]
+			if canConstruct(remaining, patterns, memo) {
+				memo[design] = true
+				return true
+			}
+		}
+	}
+
+	memo[design] = false
+	return false
+}
+
+func totalArrangements(towelPatterns []string, designs []string) int {
+	memo := make(map[string]int)
+	total := 0
+
+	for _, design := range designs {
+		total += countWays(design, towelPatterns, memo)
+	}
+
+	return total
+}
+
+func countWays(design string, patterns []string, memo map[string]int) int {
+	if design == "" {
+		return 1
+	}
+	if val, found := memo[design]; found {
+		return val
+	}
+
+	totalWays := 0
+	for _, pattern := range patterns {
+		if strings.HasPrefix(design, pattern) {
+			remaining := design[len(pattern):]
+			totalWays += countWays(remaining, patterns, memo)
+		}
+	}
+
+	memo[design] = totalWays
+	return totalWays
+}

2024/gareth/day19/day19_test.go

@@ -0,0 +1,35 @@
+package day19
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1(`r, wr, b, g, bwu, rb, gb, br
+
+brwrr
+bggr
+gbbr
+rrbgbr
+ubwu
+bwurrg
+brgr
+bbrgwb`)
+	assert.Equal(t, 6, r)
+}
+
+func TestPart2(t *testing.T) {
+	r := Part2(`r, wr, b, g, bwu, rb, gb, br
+
+brwrr
+bggr
+gbbr
+rrbgbr
+ubwu
+bwurrg
+brgr
+bbrgwb`)
+	assert.Equal(t, 16, r)
+}

2024/gareth/day19/input.txt

@@ -0,0 +1,402 @@
+rrgbg, rgguubg, rbru, rb, rrrw, wbu, gbgb, uururg, ubru, rugb, bbru, b, rggurg, wgru, bgrwb, rrgubg, ubrrbg, wgurru, rrrrw, rbrwu, wubwb, wrbbr, bgbu, brrww, brg, gbwu, wrubuur, gur, grbr, gruwrrbg, bgwr, wgugbgb, rwbru, wuwr, rrg, ruwg, rgwgr, ubu, wbr, bwg, gbu, bgrwrb, wwrw, bb, gr, rug, grr, ubwb, rbruwbu, guggug, ugu, rwbuu, bbur, wbrww, wubw, br, gruu, gwr, wrrwwu, wug, bgu, bgb, wugb, grb, rbbg, grgbwgb, rwu, bwrbb, uwrbbru, bbu, wrg, rwg, ggbgbg, wbwru, wrgrw, bburr, bgr, rgbg, bwwwugrb, uwu, rwuwrg, gguburu, uwubwu, wb, wgguug, ugrbw, rbgu, rwwu, ggbbgb, gw, wgg, rrw, uurg, uubg, bgurgb, uwgbr, wbrwu, rrbb, rww, bwgb, uugru, ggrbub, wubgw, rwwugr, uuwur, burbrg, bbr, ggb, wgr, gwbgw, rrbu, wuwwrwb, rbbr, uubw, buuu, ubbwggu, brr, urguww, uggwwgw, ugw, ug, rub, grrrwu, wurburgg, wwww, ruu, wrb, rrur, urggr, bwbwwwrg, wwbu, bbg, uwb, ggugu, gbbr, rbrgw, bg, bbuu, uwrgrg, ggbwrgw, wwgwugr, wgbwuwb, gbrwg, bbw, wwrgu, rgrwrbwb, wwwg, gugbgbg, bwrwub, rw, gbb, ggw, rrb, urrbbwb, urbu, grg, rbugggb, bruwg, uubgwgw, bw, uubgu, rru, rwww, gu, wrbrg, guu, wgu, ruuru, wubrrg, brugrg, uuggb, wrurg, rgb, rbu, urg, buw, grwbg, gwuw, grbbg, wuwu, gbgbbw, uugrwrww, wbguub, grrgbug, u, uug, uwr, wrwb, gbg, bru, wwg, bbwur, bbbbbbbw, bugbb, rwurrgr, wwb, ugbbw, bug, grgg, bgwgrrb, uggu, rurguru, wwr, rbw, ubwwgw, wrrw, rrbg, g, rgrbub, gruggw, bur, ubgb, bgg, uwur, ur, bbbwb, gwbu, wuww, uruuuubb, wbru, ugggg, gbuu, rgg, wwwug, gbrwgg, guwgr, urw, wbur, bu, rur, rrubr, ugb, ubrgrb, rbbgg, rbwrg, rggw, rguug, wwu, uur, wrrguggu, brbb, bwwwbr, guw, gugw, wgubwu, rrr, ub, ru, brrbbruw, bwwgrrbb, rubgu, uggwwg, wbb, rwr, r, ruuu, wbggg, wwwu, grbrb, rrrrr, ruwb, wuuw, rbbb, ugg, wbg, rguwr, wbw, wbuwg, ubbgrbb, urugu, rbubw, wrgwuuwu, grw, ubbbu, bwurb, rwuu, rgbbwur, urbuu, uww, wuw, bwurgu, wur, wuwwrbur, wwuu, wbgw, grbbbw, wuub, urb, wuuguuwg, wg, gwrgr, gbug, gbrbw, rwgg, brbbu, bwww, wrbbbu, wwgbggb, burug, gww, ubgrrb, bgw, rgbb, brb, wbuu, brw, ggrbrbwg, uwruw, wrgurrbb, guwrgu, rr, ugggrbr, bgrgg, urgbrbrb, wrw, wwubggu, ugurwg, grrg, bwrb, rrgwuuw, rrru, wurg, bgurwu, rgurbb, uuub, uuwb, rrrg, wrgrrrww, uwg, bgbguu, wrgwb, wwwru, rg, rrurwur, urrbb, bww, rrwwbbb, ubr, wgrbu, gru, ubg, gb, ggr, gbwbwru, uuw, rbb, gugwrg, gwb, bbb, rgrggw, uw, wggbbg, rwgubgb, gwbw, brrr, gugbwu, rwrr, uuuwbb, ugrrr, rgu, wubrwr, wrr, bwb, bwbgurb, rrrub, wub, rwgrug, rurb, gwrgrbr, rbrwbb, wwrgbg, urr, bwu, bwgu, rbuuw, bbub, wbbwubu, ggg, wbwwgwb, buwbg, wwwuru, rbg, gubugg, gbwb, www, rbr, ubur, grbbw, wgw, gbw, wgrw, rguuuu, rwb, gbrw, bbbb, gururbb, rbggwu, bub, bgbr, gurb, rrbgrb, rurwb, ugr, wgwrg, ruw, bgrr, gwu, gbr, uwugwru, wru, wr, ugbruw, grbubb, gwg, gwggurg, gugbr, ugubbgb, uwrw, uru, bwr, rgr, rbgrwg, buuw, ugbur, urgub, wurrrgww, rgguuwru, burr, rgw, rbruw, rwbwbbr, bwguw, uub, wgb, rgur, ubb, urwg, rwgww, wgub, rwwrgu, gg, rgug, gub, bggr, uuu, uu, rbug
+
+bubrbbwggggbuuwbbrwwbbgbwrruugwbwgbwugbugrgu
+wugwgwggbgubuuwugugrugwbrrwrbwwguburbbbggw
+wbbrrwwbgwbgrrbwuuwrbbrwuwburgbwgwwuruwgbggubwug
+ubrwbrbrggrwgbwbwwuwwguurbubwrbgwwrubbrwuwururwrr
+gggrwbgwbwuwrubrguwggruubrggwgbrbguwrbrgwuurbwggrggrwwwrb
+wuurugububruuwuggwuuwgbwwbrbwgrrrubwbuuwu
+grrrwrwgwuwrburruuwwubgubwwwrrrwbwwbggrbrgr
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+rrugrwurbugrrbggburwurbbgbuugwwrgbwrbrwbgbgrbwbuuww
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+rrbbubrrrwubrrwwbrrbwrbwugbrbrggwbgrwgugwuugg
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+wwbwrrbrrruuwrrwgggruwbubrrwrwuwwurwurbrbrrrw
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+rbguubrrbrgwwgwbgrwrbrggwuwguuuwbwbwwbuwgr
+wgbrrguuurgggrwgwgbrbguugrururubruugrrrrgbrgugbg
+bgurwgugurwwbuugwurrgurwwrgwgubgrrgururubguuuwugbg
+rwbbuwuwbgwbbwurbubwwugbgrbugrbuurbwwbrrwruwrrrwww
+rbrburwwbwugrggwrrrruwwgbrgurbwwrrburbbggugbwbu
+burgwubggburuuguuwrwbbgbuguguwwburububwrrgw
+gggubgbgbwgrggrbrbrgguruurwbrrwubbrbruwgwbu
+wggruwwgbwgguwgbgbggrbggbbbwbwwwrgrwwggwrgguuwwgwubgru
+bbrwwruugwwbbbwububuuwruburbwbbgrwbburrgbbrub
+gwggggwgguuburrgrgugrwgwrbbggggurgugugrgrgwwbr
+gggbbugwgbwgwugrrgbwrrwurrgugburrggrruugurbrugrbbbg
+gbwrwggbuggurrgubuguubrbgwbrubgwgrbrwubbgrr
+bwuwgurrrgwwgguubggwwuurbbrbbwgwggwuwgbbwrwrburgr
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+wbrugwbubuggrruggbruwrgrwgugwgbwugugbwguwwuubbrwwubggw
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+grbbrwbrgwgrgubuwbuwbrwuwugrbwuwwguwrbwbwwbuurgbwgw
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+wrwugwwuwwbrubwwuruuwuwrugugbwwgugrrbuuguwggbrguuugwgwbw
+uuggwbgurgurbgruruwwrrgubbuwwruruwrurbwugguwbwbgrgg
+urwbggurwbwguurugbrbwbrbgwrgrbbrubrubburuwrburww
+wbbrbwwwwrbruubggwrurgugbgbbuwgrrrrwugbwwwr
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+rrruwrgwrggwburgugwbwwwbggubuwbwuuurrggwwbwrgwgwggbguubw
+rgrgbrguruguwrggbrgruwrrbgbbbwugbrbgrbrrrggrubwuubwwbguw
+rbggwgugrbwbrbwurbrugrwbbbwuuuwrwgbbbrwbuwgbwrgggurbwug
+rgbuuwurbrwwuwbrugbggwbgbrrwguguwbubrubwguubbubgrgrwu
+gwwwgbrguruuwggwugguuwwrbwgbgwuwuuwrgruguwrbugurrwruw
+ubbgwurbrwrwggwubggugrgugwurwwbbbrbwbwgubw
+wurggrrwbwgbwuguurgwgurgugwbguuurrubuwwggwgggwg
+ugbrrwbgurbugwwwbggggggrugububwbguurruggrgrubuuwgurrwbbu
+rbrurrwuuugbwwgubugbuugruwwurwrbrrbrbgwurwuuu
+rrurrrwrwrrrbbbwguuwrruwguwuggbgguurrbbgggbwruurugurgb
+rurwwgugrrrrwbwurugwrugbgwwbuwrbwuwuguggub
+ubbgbrgggbuwggwgrgbgrgwbwggrrwbrggwgubuwgrwrbwrg
+wggruuggrwbwrwrugwgbuwggwbgrbuggrgguggubbrbruuu
+ggurbuwwbbubrguuubgwugugrgrguwrwbrubrgbwwrg
+rgrgbbbbwwruubwuwguwgububwgruwgruggbgggbuggwwgwuwwgu
+guwugugbrrbrruggwrbwbbgbburubwuuurbugubwrrug
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2024/gareth/day20/day20.go

@@ -0,0 +1,191 @@
+package day20
+
+import (
+	"container/heap"
+	"fmt"
+	"math"
+	"strings"
+)
+
+var directions = [][]int{
+	{0, 1},  // Right
+	{1, 0},  // Down
+	{0, -1}, // Left
+	{-1, 0}, // Up
+}
+
+type State struct {
+	row, col, dir, score int
+	path                 []string
+	//Would rather use tuple as key but cant get to work
+	costMap map[[2]int]int
+}
+
+type PriorityQueue []State
+
+func Part1(input string) int {
+	maze := parseInput(input)
+	_, path, costMap := solveMaze(maze)
+	cheats := findCheats(path, costMap)
+	return cheats
+}
+
+func Part2(input string) int {
+	maze := parseInput(input)
+	_, path, costMap := solveMaze(maze)
+	cheats := findCheatsPart2(path, costMap)
+	return cheats
+}
+
+func parseInput(input string) []string {
+	parts := strings.Split(input, "\n")
+	maze := []string{}
+	maze = append(maze, parts...)
+
+	return maze
+}
+
+func (pq PriorityQueue) Len() int { return len(pq) }
+func (pq PriorityQueue) Less(i, j int) bool {
+	return pq[i].score < pq[j].score
+}
+func (pq PriorityQueue) Swap(i, j int) { pq[i], pq[j] = pq[j], pq[i] }
+
+func (pq *PriorityQueue) Push(x interface{}) {
+	*pq = append(*pq, x.(State))
+}
+
+func (pq *PriorityQueue) Pop() interface{} {
+	old := *pq
+	n := len(old)
+	item := old[n-1]
+	*pq = old[0 : n-1]
+	return item
+}
+
+func solveMaze(maze []string) (int, []string, map[[2]int]int) {
+	rows := len(maze)
+	cols := len(maze[0])
+
+	// Locate start and end points
+	var startRow, startCol, endRow, endCol int
+	for i := 0; i < rows; i++ {
+		for j := 0; j < cols; j++ {
+			if maze[i][j] == 'S' {
+				startRow, startCol = i, j
+			} else if maze[i][j] == 'E' {
+				endRow, endCol = i, j
+			}
+		}
+	}
+
+	// Priority queue and visited set
+	pq := &PriorityQueue{}
+	heap.Init(pq)
+	startPath := []string{fmt.Sprintf("(%d,%d)", startRow, startCol)}
+	startCostMap := map[[2]int]int{
+		{startRow, startCol}: 0,
+	}
+	heap.Push(pq, State{startRow, startCol, 0, 0, startPath, startCostMap})
+	visited := make(map[[3]int]bool)
+
+	for pq.Len() > 0 {
+		cur := heap.Pop(pq).(State)
+
+		// If reached the end point, return the score and path
+		if cur.row == endRow && cur.col == endCol {
+			return cur.score, cur.path, cur.costMap
+		}
+
+		// Mark as visited
+		key := [3]int{cur.row, cur.col, cur.dir}
+		if visited[key] {
+			continue
+		}
+		visited[key] = true
+
+		// Explore moves
+		for i := 0; i < 4; i++ {
+			// Compute new direction
+			newDir := (cur.dir + i) % 4
+
+			// Compute new position
+			newRow := cur.row + directions[newDir][0]
+			newCol := cur.col + directions[newDir][1]
+
+			// Check bounds and wall
+			if newRow >= 0 && newRow < rows && newCol >= 0 && newCol < cols && maze[newRow][newCol] != '#' {
+				newCost := cur.score + 1
+				if oldCost, exists := cur.costMap[[2]int{newRow, newCol}]; !exists || newCost < oldCost {
+					// Update cost map
+					newCostMap := make(map[[2]int]int)
+					for k, v := range cur.costMap {
+						newCostMap[k] = v
+					}
+					newCostMap[[2]int{newRow, newCol}] = newCost
+
+					// Update path
+					newPath := append([]string{}, cur.path...)
+					newPath = append(newPath, fmt.Sprintf("(%d,%d)", newRow, newCol))
+
+					heap.Push(pq, State{
+						newRow,
+						newCol,
+						newDir,
+						newCost,
+						newPath,
+						newCostMap,
+					})
+				}
+			}
+		}
+	}
+
+	return -1, nil, nil // No path found
+}
+
+func findCheats(path []string, costLookup map[[2]int]int) int {
+
+	totalCheats := 0
+	for index, position := range path {
+
+		var row, col int
+		//Should be a better way to do this
+		fmt.Sscanf(position, "(%d,%d)", &row, &col)
+
+		for _, dir := range directions {
+			newRow := row + (dir[0] * 2)
+			newCol := col + (dir[1] * 2)
+
+			if cost, exists := costLookup[[2]int{newRow, newCol}]; exists {
+				if cost > index && (cost-index-2) >= 100 {
+					totalCheats++
+				}
+			}
+		}
+	}
+	return totalCheats
+}
+
+func findCheatsPart2(path []string, costLookup map[[2]int]int) int {
+	totalCheats := 0
+
+	for index, position := range path {
+		var row, col int
+		//Should be a better way to do this
+		fmt.Sscanf(position, "(%d,%d)", &row, &col)
+
+		for x1 := row - 20; x1 <= row+20; x1++ {
+			for y1 := col - 20 + int(math.Abs(float64(row-x1))); y1 <= col+20-int(math.Abs(float64(row-x1))); y1++ {
+				if cost, exists := costLookup[[2]int{x1, y1}]; exists && cost != -1 {
+					diff := cost - index - int(math.Abs(float64(row-x1))) - int(math.Abs(float64(col-y1)))
+					if cost > index && diff >= 100 {
+						totalCheats++
+					}
+				}
+			}
+		}
+	}
+
+	return totalCheats
+}

2024/gareth/day20/day20_test.go

@@ -0,0 +1,45 @@
+package day20
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1(`###############
+	#...#...#.....#
+	#.#.#.#.#.###.#
+	#S#...#.#.#...#
+	#######.#.#.###
+	#######.#.#...#
+	#######.#.###.#
+	###..E#...#...#
+	###.#######.###
+	#...###...#...#
+	#.#####.#.###.#
+	#.#...#.#.#...#
+	#.#.#.#.#.#.###
+	#...#...#...###
+	###############`)
+	assert.Equal(t, 44, r)
+}
+
+func TestPart2(t *testing.T) {
+	r := Part2(`###############
+	#...#...#.....#
+	#.#.#.#.#.###.#
+	#S#...#.#.#...#
+	#######.#.#.###
+	#######.#.#...#
+	#######.#.###.#
+	###..E#...#...#
+	###.#######.###
+	#...###...#...#
+	#.#####.#.###.#
+	#.#...#.#.#...#
+	#.#.#.#.#.#.###
+	#...#...#...###
+	###############`)
+	assert.Equal(t, 285, r)
+}

2024/gareth/day20/input.txt

@@ -0,0 +1,141 @@
+#############################################################################################################################################
+#...###...#.......###...........###...#...#####...#...#...###...#...#.........###...#.......#...#.....#.........#...........#...............#
+#.#.###.#.#.#####.###.#########.###.#.#.#.#####.#.#.#.#.#.###.#.#.#.#.#######.###.#.#.#####.#.#.#.###.#.#######.#.#########.#.#############.#
+#.#.#...#.#.#...#...#.#.........#...#.#.#...#...#.#.#...#.....#.#.#.#.....#...#...#.#...#...#.#.#.#...#.....#...#.#.........#.....#.........#
+#.#.#.###.#.#.#.###.#.#.#########.###.#.###.#.###.#.###########.#.#.#####.#.###.###.###.#.###.#.#.#.#######.#.###.#.#############.#.#########
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+###...#...#...#...#.....#...#...........#.....###.......#.....#.......#.....###...#.........#.......................#.......................#
+#############################################################################################################################################

2024/gareth/day21/day21.go

@@ -0,0 +1,125 @@
+package day21
+
+import (
+	"strconv"
+	"strings"
+)
+
+type coordinate struct {
+	row, col int
+}
+
+var numberPad = map[string]coordinate{
+	"7": {0, 0}, "8": {0, 1}, "9": {0, 2},
+	"4": {1, 0}, "5": {1, 1}, "6": {1, 2},
+	"1": {2, 0}, "2": {2, 1}, "3": {2, 2},
+	"0": {3, 1}, "A": {3, 2},
+}
+
+var robotPad = map[string]coordinate{
+	"^": {0, 1}, "A": {0, 2},
+	"<": {1, 0}, "v": {1, 1}, ">": {1, 2},
+}
+
+type cacheKey struct {
+	sequence   string
+	iterations int
+}
+
+var memo = make(map[cacheKey]int)
+
+func Part1(input string) int {
+	codes := parseInput(input)
+
+	numpadGraph := createGraph(numberPad, coordinate{3, 0})
+	dirpadGraph := createGraph(robotPad, coordinate{0, 0})
+
+	total := 0
+	for _, code := range codes {
+		codeInt, _ := strconv.Atoi(code[:len(code)-1])
+		total += codeInt * getLength(code, 3, true, numpadGraph, dirpadGraph)
+	}
+	return total
+}
+
+func Part2(input string) int {
+	codes := parseInput(input)
+
+	numpadGraph := createGraph(numberPad, coordinate{3, 0})
+	dirpadGraph := createGraph(robotPad, coordinate{0, 0})
+
+	total := 0
+	for _, code := range codes {
+		codeInt, _ := strconv.Atoi(code[:len(code)-1])
+		total += codeInt * getLength(code, 26, true, numpadGraph, dirpadGraph)
+	}
+	return total
+}
+
+func parseInput(input string) []string {
+	parts := strings.Split(input, "\n")
+	codes := []string{}
+	codes = append(codes, parts...)
+	return codes
+}
+
+func createGraph(keypad map[string]coordinate, invalidCoords coordinate) map[string]string {
+	graph := make(map[string]string)
+
+	for a, coordA := range keypad {
+		for b, coordB := range keypad {
+			x1, y1 := coordA.row, coordA.col
+			x2, y2 := coordB.row, coordB.col
+
+			path := strings.Repeat("<", max(0, y1-y2)) +
+				strings.Repeat("v", max(0, x2-x1)) +
+				strings.Repeat("^", max(0, x1-x2)) +
+				strings.Repeat(">", max(0, y2-y1))
+
+			if invalidCoords == (coordinate{x1, y2}) || invalidCoords == (coordinate{x2, y1}) {
+				path = reverseString(path)
+			}
+			graph[a+"->"+b] = path + "A"
+		}
+	}
+
+	return graph
+}
+
+func reverseString(s string) string {
+	runes := []rune(s)
+	for i, j := 0, len(runes)-1; i < j; i, j = i+1, j-1 {
+		runes[i], runes[j] = runes[j], runes[i]
+	}
+	return string(runes)
+}
+
+func getLength(sequence string, iterations int, firstIter bool, numpadGraph map[string]string, dirpadGraph map[string]string) int {
+
+	if iterations == 0 {
+		return len(sequence)
+	}
+
+	key := cacheKey{sequence: sequence, iterations: iterations}
+	if cachedResult, exists := memo[key]; exists {
+		return cachedResult
+	}
+
+	graph := numpadGraph
+	if !firstIter {
+		graph = dirpadGraph
+	}
+
+	totalLength := 0
+	prev := "A"
+	for _, char := range sequence {
+		graphKey := prev + "->" + string(char)
+		if subSequence, exists := graph[graphKey]; exists {
+			totalLength += getLength(subSequence, iterations-1, false, numpadGraph, dirpadGraph)
+		}
+		prev = string(char)
+	}
+
+	memo[key] = totalLength
+	return totalLength
+}

2024/gareth/day21/day21_test.go

@@ -0,0 +1,25 @@
+package day21
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1(`029A
+980A
+179A
+456A
+379A`)
+	assert.Equal(t, 126384, r)
+}
+
+func TestPart2(t *testing.T) {
+	r := Part2(`029A
+980A
+179A
+456A
+379A`)
+	assert.Equal(t, 126384, r)
+}

2024/gareth/day21/input.txt

@@ -0,0 +1,5 @@
+985A
+540A
+463A
+671A
+382A

2024/gareth/day22/day22.go

@@ -0,0 +1,112 @@
+package day22
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+type Queue struct {
+	data []int
+	size int
+}
+
+func NewQueue(size int) *Queue {
+	return &Queue{
+		data: make([]int, 0, size),
+		size: size,
+	}
+}
+
+func (queue *Queue) Push(value int) {
+	if len(queue.data) == queue.size {
+		queue.data = queue.data[1:]
+	}
+	queue.data = append(queue.data, value)
+}
+
+func (queue *Queue) Get() []int {
+	return queue.data
+}
+
+func (queue *Queue) String() string {
+	strs := make([]string, len(queue.data))
+	for i, val := range queue.data {
+		strs[i] = fmt.Sprintf("%d", val)
+	}
+	return strings.Join(strs, ", ")
+}
+
+func Part1(input string) int {
+	secretNumbers := parseInput(input)
+
+	total := 0
+	for _, number := range secretNumbers {
+		for i := 0; i < 2000; i++ {
+			number = getNextNumber(number)
+		}
+		total += number
+	}
+	return total
+}
+
+func Part2(input string) int {
+	secretNumbers := parseInput(input)
+	memo := make(map[string]int)
+
+	for _, number := range secretNumbers {
+		seen := make(map[string]bool)
+		queue := NewQueue(4)
+		prevNumber := secretNumbers[0] % 10
+
+		for i := 0; i < 2000; i++ {
+			singleNumber := number % 10
+			cost := singleNumber - prevNumber
+			queue.Push(cost)
+			if i > 3 {
+				if _, ok := seen[queue.String()]; !ok {
+					memo[queue.String()] += singleNumber
+					seen[queue.String()] = true
+				}
+			}
+			prevNumber = singleNumber
+			number = getNextNumber(number)
+		}
+	}
+	return maxMapValue(memo)
+}
+
+func parseInput(input string) []int {
+	parts := strings.Split(input, "\n")
+	secretNumbers := []int{}
+	for _, part := range parts {
+		num, _ := strconv.Atoi(part)
+		secretNumbers = append(secretNumbers, num)
+	}
+
+	return secretNumbers
+}
+
+func getNextNumber(number int) int {
+	step1 := (number * 64) ^ number
+	step1 = step1 % 16777216
+
+	step2 := (step1 / 32) ^ step1
+	step2 = step2 % 16777216
+
+	step3 := (step2 * 2048) ^ step2
+	step3 = step3 % 16777216
+
+	return step3
+}
+
+func maxMapValue(memo map[string]int) int {
+	maxValue := 0
+
+	for _, value := range memo {
+		if value > maxValue {
+			maxValue = value
+		}
+	}
+	return maxValue
+}

2024/gareth/day22/day22_test.go

@@ -0,0 +1,23 @@
+package day22
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1(`1
+10
+100
+2024`)
+	assert.Equal(t, 37327623, r)
+}
+
+func TestPart2(t *testing.T) {
+	r := Part2(`1
+2
+3
+2024`)
+	assert.Equal(t, 23, r)
+}

2024/gareth/go.mod

@@ -0,0 +1,11 @@
+module aoc2024
+
+go 1.23.2
+
+require github.com/stretchr/testify v1.10.0
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

2024/gareth/go.sum

@@ -0,0 +1,9 @@
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.10.0 h1:Xv5erBjTwe/5IxqUQTdXv5kgmIvbHo3QQyRwhJsOfJA=
+github.com/stretchr/testify v1.10.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

2024/gareth/main.go

@@ -0,0 +1,17 @@
+package main
+
+import (
+	"aoc2024/day22"
+	"fmt"
+	"os"
+	"time"
+)
+
+func main() {
+	start := time.Now()
+	data, _ := os.ReadFile("day22/input.txt")
+	fmt.Printf("part 1: %d\n", day22.Part1(string(data)))
+	fmt.Printf("part 2: %d\n", day22.Part2(string(data)))
+	elapsed := time.Since(start)
+	fmt.Printf("Execution time: %s\n", elapsed)
+}

2024/go/day01/day01.go

@@ -35,7 +35,7 @@ func Part2(input string) int {
 	list2 := make(map[int]int)
 
 
-	num := 0
+	num := 1
 	lines := strings.Split(input, "\n")
 	for _, line := range lines {
 		fields := strings.Fields(line)

2024/go/day02/day02.go

@@ -0,0 +1,105 @@
+package day02
+
+import (
+	"adventofcode2024/utils"
+	_ "adventofcode2024/utils"
+	_ "adventofcode2024/utils/grid2d"
+	_ "adventofcode2024/utils/inputs"
+	_ "errors"
+	_ "fmt"
+	"strings"
+)
+
+type Dir int
+
+const (
+    Up Dir = iota
+    Down
+    Safe
+	Unsafe
+)
+
+// Implement the Stringer interface
+func (d Dir) String() string {
+    switch d {
+    case Up:
+        return "Up"
+    case Down:
+        return "Down"
+    case Safe:
+        return "Safe"
+	case Unsafe:
+        return "Unsafe"
+	default:
+		return "Unknown"
+    }
+}
+
+func Part1(input string) int {
+	count := 0
+	lines := strings.Split(input, "\n")
+	for _, line := range lines {
+		fields := strings.Fields(line)
+		if isSafe(fields) {count++}
+	}
+	return count
+}
+
+func Part2(input string) int {
+	count := 0
+	lines := strings.Split(input, "\n")
+	for _, line := range lines {
+		fields := strings.Fields(line)
+		if isSafe(fields) {
+			count++
+		} else {
+			for i := 0; i < len(fields); i++ {
+				// Create a new slice excluding the current item
+				newFields := applyDampner(fields, i)
+				if isSafe(newFields) {
+					count++
+					break
+				}
+			}
+		}
+	}
+	return count
+}
+
+func isSafe(fields []string) bool {
+	Dir := getDir(utils.MustAtoi(fields[0]), utils.MustAtoi(fields[1]))
+	if Dir == Unsafe {
+			return false
+	}
+	for x := 2; x < len(fields); x++ {
+		NextDir := getDir(utils.MustAtoi(fields[x-1]), utils.MustAtoi(fields[x]))
+		if NextDir == Unsafe {
+			return false
+		}
+		if NextDir != Dir {
+			return false
+		}
+	}
+	return true
+}
+
+func getDir(a int, b int) Dir {
+	var dir Dir
+	diff := b - a
+	if diff > 0 && utils.Abs(diff) < 4 {
+		dir = Up
+	} else if diff < 0 && utils.Abs(diff) < 4 {
+		dir = Down
+	} else {
+		dir = Unsafe
+	}
+	return dir
+}
+
+func applyDampner(fields []string, pos int) []string {
+	copy := append([]string{}, fields...)
+    if pos < 0 || pos >= len(copy) {
+        return copy // Return the fields unchanged if pos is invalid
+    }
+    return append(copy[:pos], copy[pos+1:]...)
+}

2024/go/day02/day02_test.go

@@ -0,0 +1,29 @@
+package day02
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1(		
+`7 6 4 2 1
+1 2 7 8 9
+9 7 6 2 1
+1 3 2 4 5
+8 6 4 4 1
+1 3 6 7 9`)
+	require.Equal(t, 2, r)
+}
+
+func TestPart2(t *testing.T) {
+	r := Part2(
+`7 6 4 2 1
+1 2 7 8 9
+9 7 6 2 1
+1 3 2 4 5
+8 6 4 4 1
+1 3 6 7 9`)
+	require.Equal(t, 4, r)
+}

2024/go/day03/day03.go

@@ -0,0 +1,64 @@
+package day03
+
+import (
+	"adventofcode2024/utils"
+	"fmt"
+	"regexp"
+)
+
+func Part1(input string) int {
+	val := 0
+
+	pattern := `mul\((\d{1,3}),(\d{1,3})\)`
+	re := regexp.MustCompile(pattern)
+	matches := re.FindAllStringSubmatch(input, -1)
+
+	fmt.Println("Matches found:")
+	for _, match := range matches {
+		if len(match) == 3 { // match[1] is x, match[2] is y
+			x := utils.MustAtoi(match[1])
+			y := utils.MustAtoi(match[2])
+			val += x * y
+		}
+	}
+	return val
+}
+
+func Part2(input string) int {
+	val := 0
+	pattern := `mul\((\d{1,3}),(\d{1,3})\)`
+	re := regexp.MustCompile(pattern)
+	matches := re.FindAllStringSubmatchIndex(input, -1)
+
+	fmt.Println("Matches found:")
+	for _, match := range matches {
+		if len(match) == 6 { 
+			xStart, xEnd := match[2], match[3]
+			yStart, yEnd := match[4], match[5]
+			x := utils.MustAtoi(input[xStart:xEnd])
+			y := utils.MustAtoi(input[yStart:yEnd])
+			if do(input[:xStart]) {
+				val += x * y
+			}
+		}
+	}
+	return val
+}
+
+func do(input string) bool {
+	pattern := `don't\(\)|do\(\)`
+	re := regexp.MustCompile(pattern)
+
+	matches := re.FindAllString(input, -1)
+
+	if len(matches) > 0 {
+		// Get the last match
+		lastMatch := matches[len(matches)-1]
+		if lastMatch == "don't()" {
+			return false
+		} else if lastMatch == "do()" {
+			return true
+		}
+	}
+	return true
+}

2024/go/day03/day03_test.go

@@ -0,0 +1,17 @@
+package day03
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1("")
+	require.Equal(t, 0, r)
+}
+
+func TestPart2(t *testing.T) {
+	r := Part2("xmul(2,4)&mul[3,7]!^don't()_mul(5,5)+mul(32,64](mul(11,8)undo()?mul(8,5))")
+	require.Equal(t, 48, r)
+}

2024/go/day03/input.txt

@@ -0,0 +1,6 @@
+~-mul(858,892)?@#mul(380,985)what()[^what()%mul(340,11)~*}don't())/~-mul(849,387)%-why()when():how()>-,what()mul(605,504)what()~:]what();how()who()];mul(771,783)?^ who()}~?>mul(111,830))@ ~mul(329,797)%'why()why()mul(125,409)-*/where()()@&!why()mul(390,37)when(974,538)#/when()){/don't()/mul(20,990)}?%{(who()mul(627,567)(how()'<(#%how()mul(387,315){;%who()%#from()mul(868,680)}^$mul(862,19)mul(847,689)>((#@when()}mul(339,156)+/{}@{^%[why(231,704)mul(236,754)]'^where(978,690)mul(460,872)#'*mul(518,944)>mul(301,886))mul(477,933)^mul(685,909)who())]what(288,791)mul(170,434){ &where()~(@where()mul(191,104)mul(637,600)&select()why())~select()mul(534,617)?mul(763,508){from()when(22,266)+who() when()mul(204,352)when()mul(426,122)-<*where()'$ why()mul(192,980)[(#[!$-}mul(798,208)''[!where()what()select()mul(295,727))#)}($<?<mul(452,502)(don't()mul(737,492)>,$%where(539,126)what()when()select()'@mul(311,541),?don't()#select()!}!(}&?mul(100,142)),-}%mul(222,856)~$;>!from()where()mul(758,901)mul(757,796)mul(976,686);@'~+-{#who()mul(26,971);mul(404,362)^~who(417,106)what()#mul(186,691)from() %#+{/mul(67,433)-who()!-+!mul(184,469)*when()[&when(458,221)<$mul(163,556)^)]?,'}&+who()mul(514,239)~)(mul(143,441)'how(741,776)~who(766,575)when();>*^mul(281,143)+!>;+:mul(767,44)#<mul(490,849)> when()why()don't()how()from()[from()from(){mul(436,519)what() *who();@{,>do()%'mul(19,540)when()mul(643,539)~when(812,543)mul(527,639)-!mul(409,379)where()/(mul(168,491)#$>]mul(432,333)@%<when();{?what()^mul(819,413)'where(65,845)}-' ^@don't()?how()when()>><mul(591,832)where(600,755)]who()}do()!^-$what()from()select()'#mul(572,956)@#:what()from(),]mul(303,346) when()$$how()@%/#$mul(857,344)/what()where()mul(969,234)$!#when()>>&who()(mul(113,494)%where()why()when()mul(659,592)<why()!<}mul(429,162)[who()*>#(/'mul(72,670)when()^^mul(369,596)mul(631,168)-why()()[*}mul(330,968) $why()where()mul(230,139)don't()@)@<mul(849,413)-when(){*?]mul(821,9)mul(753,277)]{&when()%:mul(262,360)what()mul(65,276)don't()])who();where()$!,(-mul(952,221)+:/{where()where()mul(608,843)'>where())%}where()&,}mul(875,661)~don't()':why(){mul(793*:mul(399,702)!://select()@when()why()do()@mul(488,581{?{&<who(617,140)@how()mul(156,982)why()'&<where()*:{mul(452{-+$$*/mul(202,724)]#:#why()+??(#mul(607,2)@^mul(20,845)#{+#[/#~/mul(111,872)how()select()]<how())'how()mul(921,254)$:;/where() ~why()}?mul(558,122)@how()<<who()mul(992,319)what(734,450)[^mul(498,490)/mul(632,639)when()]from(){why()]$[who(664,268)mul(401,695]!>how()&select()!<'mul(912,311)why()! })@+}mul(128*mul(626,752)%mul(49,60)[,who()what()select()<what()mul(24,8)>)@@]*]why(937,788)from():mul(945,658)<]don't()where()how(515,644)@+'select()how()mul(369,665)/],<when(){( $how()mul(361,594)$select()&:{:$when()mul(52,806) #from()@when()where():>mul(263,185)where()^why()why()@what()mul(82,407)mul(464,537)[mul(871,333)^mul(560,227)-why()mul(966,203)$what()+where()#mul(101,21)}%how(),)^who()>,select()mul(667,565)('what(),%select()(@mul(500,204:''<~'why(477,559)<do()>)[where()mul(698,648);how(){&?what()^@[%mul(280,395)>~, mul-#/%:where()>where():mul(170,746)don't()}($:@mul(998,876)*~<[mul(121,366)-?#;how()>from() ::mul(804,883)^-[  (:mul(100,354who(544,766)+,]>!['/;mul(949,115)
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+who()+from()where()mul(878,982)]~mul(812,80)?select()don't()how()];mul(986,548)/how(311,658)/select()(don't()(select()select(533,328)<^+from()what()why()@mul(786,152)*<[ }},)mul(30,285)mul(721,12)#(-{what()mul(70,496)^when()-/how(420,87)select()what()]$mul(645,406);-~where()>do()~&^(,}$#$mul(993,357)?/select()}do()+from()~@mul(661,590))what()*!?]*!'mul(19,345)-why())select(){%(% don't():*#when()~select()mul(910,416)}mul(550,400)<from();/)$who()mul(107,198)*^;what()*mul(585,659)]}<*[mul(408,612)(how()+'[don't()select()mul(910,993)({[who(895,379)>when()]~mul(515,93)&where()mul(412,99);(;+mul(611,500%what()%,from()when()mul(822,769),-*(([$(mul(153,856)why(){mul(476,25)do()-mul?from()<<[why()&mul(859,60)what()]+ :how()what(434,726):^from()do()}*?}?mul(432,641)>%<why();where()mul(722,325)who()why()do()'$,>?!mul(93,484)++}?mulwho()#>who()select(): why()mul(889,212)>]?where()&mul(808,71)<*/'-+select()mul(523,619)+#where()mul(324,306)why()';why()}mul(337,315)~:what():^?-$from()mul(924,137)mul(444,59)why()[from()how()who()mul/how()>mul(304,707)'select() select()mul(224,915)mul(991,306)[>$! &how()>/mul(719,679)how()select()mul(65,620)from()#'~:]<mul(906,303)}what():how()&%^select():{mul(644,751),^,&,!*'@mul(323,720)why()>+-from()]mul(971,857)how()#[~~]?%mul(230,961)from()from())# } where()mul(330,14)>mul(411,981)}}<)mul(304,453)how()from()$who()mul(573,848)% ;:<mul(23,887)>from()(~select()!mul(542,790)}'#mul(530,502)%$(-#$mul(358,540)mul(10,361)when()where()<}&where()mul(429+!*$~)mul(446,812)%when()don't()>~>^what()select()why()from()where()mul(330,214) -[mul(731,164)/mul(776,235)mul(240,20)who()^what()']@!-who()%don't()(( )'!how()why();>mul(941,911)'?where()from()how()/mul(489,746(select(725,995)-from()?;when()%]%<mul(293,629){;what();(~!<mul(176,456)<~who(252,77)who()~{why()?]&mul(587,279){%?]from()<?mul(313,626)@[/how()+&don't()mul(298,798@!'&when()~(#[mul(827,523)from()$ where()who()%mul(54,803))*mulselect()%mul(500,731)mul(946,993&;{/;where()^where()mul(795,350)where(),~  @^how()-]mul(995,399)%who()do()where()mul(911,909$(?!$]]~what()mul(151,846)[select(636,807)mul(111,19)where(){^mul(730,317)who()^do()'~#]$/$@<>mul(555,315),how()#%!><from();mul(845,939)>?mul(664,596how()+'-who()from(51,408)mul(605,672)?!%from()) #}don't():}mul(579where()mul(243,699)mul(321,902)*!/mul(465,704)*when()[*how()mul-!mul(15,80)}#}mul(413,156)(;mul(71,288)/$;'don't(),how()+[;$who()%$when()mul(516,863)mul(268,600)(</from()~how()'<how()where()mul(715,920)&,mul(989,598)[~where()where()mul(635,110);from()*mul(843,35)&*}@[how(232,546)'-+ mul(979,532)[do()&mul(649,85)]how(832,401)-;mul(876,724)-[mul(432,417)!from()select()]mul(967,886'mul(561,191)#mul(660,865)-}~#mul(736$mul(623,276)from(93,634)^<&-+!@(how()mul(543,427)]#what()from()mul(247,751))from()where()+/^@!;?mul(919,365)where()]&!{-:~why()mul(220,330):]&mul(919,207)-&who()?*how()#%mul(759,323)!how()how()mul(695,755)[{mul(426,127)-{% /~mul '*&how()who()^(mul(797,201)'mul(509from()when()(@(<()don't() :&mul(852,261)<#^]from()mul(981,414)(</who()*do()(+where()*'why()what(229,53)+mul(954,398)mul(148,957)what()^&*mul(92,295)select(){mul(146,508)  who()}[>mul(602,939)who())>)<&'!mul(323,967)?mul(673,398)):&#}>>{!mul(501,484)<;who(969,453)-who(624,921)-)<-mul(72{-//!mul(576,751)mul(318,331)mul(707,186)+how()mul(660#how()!+#?where()mul(547,453)
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2024/go/day04/day04.go

@@ -0,0 +1,59 @@
+package day04
+
+import (
+	"adventofcode2024/utils/grid2d"
+	"adventofcode2024/utils/inputs"
+)
+
+func Part1(input string) int {
+	val := 0
+	grid := inputs.ToGrid2D(input, "\n", "", '.', func(c string) rune { return rune(c[0])})
+	directions := [][]int{{0,1},{0,-1},{1,0},{-1,0},{-1,1},{1,1},{-1,-1},{1,-1}}
+	for j := 0; j < grid.SizeY(); j++ {
+		for i := 0; i < grid.SizeX(); i++ {
+			if  !checkChar(i, j, grid, 'X') { continue }			
+			for _, dir := range directions {
+				x := i + dir[0]
+				y := j + dir[1]
+				if !checkChar(x, y, grid, 'M') { continue }
+				x = x + dir[0]
+				y = y + dir[1]				
+				if !checkChar(x, y, grid, 'A') { continue }
+				x = x + dir[0]
+				y = y + dir[1]				
+				if !checkChar(x, y, grid, 'S') { continue }
+				val++
+			}
+		}
+	}
+	return val
+}
+
+func Part2(input string) int {
+	val := 0
+	grid := inputs.ToGrid2D(input, "\n", "", '.', func(c string) rune { return rune(c[0])})
+	dir1 := [][]int{{-1,1},{1,-1},}
+	dir2 := [][]int{{1,1},{-1,-1}}
+	for j := 0; j < grid.SizeY(); j++ {
+		for i := 0; i < grid.SizeX(); i++ {
+			if !checkChar(i, j, grid, 'A') { continue }
+			if 
+			(checkChar(i + dir1[0][0], j + dir1[0][1], grid, 'M') && checkChar(i + dir1[1][0], j +  dir1[1][1], grid, 'S') ||
+			checkChar(i + dir1[0][0], j +  dir1[0][1], grid, 'S') && checkChar(i + dir1[1][0], j +  dir1[1][1], grid, 'M')) &&
+			(checkChar(i + dir2[0][0], j + dir2[0][1], grid, 'M') && checkChar(i + dir2[1][0], j +  dir2[1][1], grid, 'S') ||
+			checkChar(i + dir2[0][0], j +  dir2[0][1], grid, 'S') && checkChar(i + dir2[1][0], j +  dir2[1][1], grid, 'M') ) {
+				val++ 
+			}
+		}
+	}
+	return val}
+
+func checkChar(x int, y int, grid *grid2d.Grid[rune], c rune) bool {
+	if x < 0 || x >= grid.SizeX() || y < 0 || y >= grid.SizeY() {
+		return false
+	}
+	if grid.Get(x, y) == c {
+		return true
+	}
+	return false
+}

2024/go/day04/day04_test.go

@@ -0,0 +1,35 @@
+package day04
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1(`MMMSXXMASM
+MSAMXMSMSA
+AMXSXMAAMM
+MSAMASMSMX
+XMASAMXAMM
+XXAMMXXAMA
+SMSMSASXSS
+SAXAMASAAA
+MAMMMXMMMM
+MXMXAXMASX`)
+	require.Equal(t, 18, r)
+}
+
+func TestPart2(t *testing.T) {
+	r := Part2(`MMMSXXMASM
+MSAMXMSMSA
+AMXSXMAAMM
+MSAMASMSMX
+XMASAMXAMM
+XXAMMXXAMA
+SMSMSASXSS
+SAXAMASAAA
+MAMMMXMMMM
+MXMXAXMASX`)
+	require.Equal(t, 9, r)
+}

2024/go/day04/input.txt

@@ -0,0 +1,140 @@
+MSAMXXMASXSXMMSASXMASMXMASXSXSSMSSSMMMSSSSMSAMXASAMXXAXMSMMMAXMAMSAMXAMXMXXMXMASMXSAXMXMAMXSXSXXMSSXMSSMMSSMMMMXSXAXMXMAMMASMSXSXSSXMSSMSSMM
+MSASASAAXSMAMMSAMXSXXMAMXSASAAAASMSASAASAAAMMMSXXMMMSMMXAAASMMMMSAMXSAXASMMSSMMXAXXMSSXXMSMMASMXMASXAAXAAAAAAMAASXSAMAXSMSMMASAXAXAAAAAMAAAS
+ASAMASMMMASXMAMAMXXAXSMSAMAMMMMMMAMMMMXXMMMMSASXXMAXAASXSSMSASAMXMSAMXSASAMAASAMXMAAAMXMASAMAMXMMASMMMSMMSSMMMMMSAAASMSMAAMSAMAMXMXMMXSMXXMM
+MMAMAMAAAMAMMASMMXMMMXAAMMXMMXXXMXSXASXSMSXXMASAMSSSMSMAAMASXMASAAMASXSAMXMSSMMXSMMMXSAXAXAMSSMAMASXMASXMAMMSMMASAMXMMAMMMMMXSXMSMXMASMXSASA
+XSAMAXSMSXAMSASASXMAAXSSMXXXAXMXSAAXXSAAASASMAMAXAXAMXMSMMMMMSAMMMSXMMMAMXAXAAAAMXMSAXMSSMSMASASMAMXMASXMAXAAAMMSAXXSSXMXSXMXXAMXMMMSMAASMMS
+MSXMMXMXXMMMMASAMMSMXXAAXXSASMMAMAMMXMMMMMAMMASAMMSAMSXMASXXXSAXSXSMSAMASXMSSMMSXAXMASMXMAXMMXSAMSSSMXSASAMXSSMXSASAMXMAXMASMSSMASAXAMMMSMAM
+XMAMSAMMSAMXMMMMMAASMMSAMXXMMAMASMXSAMASXMXMXASASXAAASASAMMMASXMSXMASXSASAMAMXAMMSMMXMXAMAMAMSMMSAMAAMSAMXSAAXMASAMXMXMASMXMASASASXSMAXAXMAS
+SMAMXASAMAMXMMXAMSSSXAMASXXXXXSASAAXASASXMAXMXXXMMXMXSAMXSXAXSMMMAMAMAMMSXMMSMASAAAMXSSMMXSXMAAXMASMMMMAMAMMMMMXSXXAAASAMXAXXSAMXSAMXSMMXSAS
+XSXSSMMXSAMXMMMMMMAMMXSAMMMMSXMAMMMSAMASASMSSSXAXMAMXMMMMMXSAMAAXAMASXSAMXXSAMXMMSMMAXASAAMASXSMSMMMAAXAMSMSAMSASXSMSMSAMSMMMMMMSMMMAMASXMAS
+MAMXAAAAXMMAMAAMAMSMSXMASAAAAAMXMAASXMMMMMAAAXSXASAXMXMAXSAMXSSMSSSXSXMXSAXXMSAMXXXMXSAMMMSAMAAAAMASXMXMMMAMAMSAMAXAMASMMAMASAMXAAAMAMAMAMAM
+SAAMSMMSSXXAXSMSAXXASXMXSXMMSAMXMMMSXSXSAMMMSMMSMMAXSASASMAMAXAAAAAAMMSXMXSXASMSAMAMAMAMXAMAXXXMAMASAMASAMAMMAMAMSMMMAMASXSASASAMSMSMSSSSMAM
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+MSMMMMMSAAMXXAAMAMXXMAXSSMSMMMAMXMAMAMAAXAMXAXAMMSXSXMASXXMAAMAMSAMASXMMMMMMMAXAXXSAMXXAMAMAMXMMAMXAASAAASASAMASXAXMXXSXSMSAMAMXMSSMMMSAMMXM
+SAAXXAAMSSMMSSSSSMXMMMMMAMXAMMSMASXSSSSMMSMMSMSMXMAXASAMMASAMMAMMAMAMAMAXAAMXXMASAMXMXMAMSMAMMMSAMXSSSMMMMXMMSMXXMMASMSAMAAXMSMAMAXAMAMAMAAM
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2024/go/day06/day06.go

@@ -0,0 +1,291 @@
+package day06
+
+import (
+	"adventofcode2024/utils/grid2d"
+	"adventofcode2024/utils/inputs"
+	"fmt"
+	_ "strings"
+)
+
+type Direction int
+
+const (
+	_ Direction = iota
+	Up
+	Down
+	Left
+	Right
+)
+
+type Pos struct {
+	x int
+	y int
+}
+type Loc struct {
+	dir   Direction
+	pos   Pos
+	count int
+}
+
+type Point struct {
+	dirs    []Direction
+	display string
+}
+
+func (d Direction) String() string {
+	return [...]string{"-", "Up", "Down", "Left", "Right"}[d]
+}
+
+func (l Loc) String() string {
+	return fmt.Sprintf("Direction: %s, Position: %d %d", l.dir, l.pos.x, l.pos.y)
+}
+
+func Part1(input string) int {
+	var loc Loc
+	grid := inputs.ToGrid2D(input, "\n", "", "", func(c string) string { return c })
+	for x := 0; x < grid.SizeX(); x++ {
+		for y := 0; y < grid.SizeY(); y++ {
+			if grid.Get(x, y) == "^" {
+				loc = Loc{dir: Up, pos: Pos{x: x, y: y}}
+			}
+			if grid.Get(x, y) == "v" {
+				loc = Loc{dir: Down, pos: Pos{x: x, y: y}}
+			}
+			if grid.Get(x, y) == ">" {
+				loc = Loc{dir: Right, pos: Pos{x: x, y: y}}
+			}
+			if grid.Get(x, y) == "<" {
+				loc = Loc{dir: Left, pos: Pos{x: x, y: y}}
+			}
+		}
+	}
+	fmt.Println(grid.Matrix())
+	fmt.Printf("%v\n", loc)
+	grid.Set(loc.pos.x, loc.pos.y, "X")
+	loc.count = 1
+	move1(&loc, grid)
+	return loc.count
+}
+
+func Part2(input string) int {
+	var loc Loc
+	grid := inputs.ToGrid2D(input, "\n", "", Point{}, func(c string) Point { return Point{dirs: make([]Direction, 1), display: c} })
+	for x := 0; x < grid.SizeX(); x++ {
+		for y := 0; y < grid.SizeY(); y++ {
+			if grid.Get(x, y).display == "^" {
+				loc = Loc{dir: Up, pos: Pos{x: x, y: y}}
+			}
+			if grid.Get(x, y).display == "v" {
+				loc = Loc{dir: Down, pos: Pos{x: x, y: y}}
+			}
+			if grid.Get(x, y).display == ">" {
+				loc = Loc{dir: Right, pos: Pos{x: x, y: y}}
+			}
+			if grid.Get(x, y).display == "<" {
+				loc = Loc{dir: Left, pos: Pos{x: x, y: y}}
+			}
+		}
+	}
+	fmt.Println(grid.Matrix())
+	fmt.Printf("%v\n", loc)
+	point := grid.Get(loc.pos.x, loc.pos.y)
+	grid.Set(loc.pos.x, loc.pos.y, Point{dirs: append(point.dirs, Up), display: "X"})
+	for x := 0; x < grid.SizeX(); x++ {
+		for y := 0; y < grid.SizeY(); y++ {
+			grid = inputs.ToGrid2D(input, "\n", "", Point{}, func(c string) Point { return Point{dirs: make([]Direction, 1), display: c} })
+			p := grid.Get(x, y)
+			if p.display == "." {
+				grid.Set(x, y, Point{dirs: p.dirs, display: "#"})
+				l := loc
+				if isLoop(&l, grid) {
+					loc.count++
+				}
+				grid.Set(x, y, Point{dirs: p.dirs, display: "."})
+			}
+		}
+	}
+	return loc.count
+}
+
+func isLoop(loc *Loc, grid *grid2d.Grid[Point]) bool {
+	for {
+		_, _, err := move2(loc, grid)
+		if err != nil { return false }
+		if contains(loc.dir, grid.Get(loc.pos.x, loc.pos.y)) {
+			return true
+		} else {
+			p := grid.Get(loc.pos.x, loc.pos.y)
+			grid.Set(loc.pos.x, loc.pos.y, Point{dirs: append(p.dirs, loc.dir), display: "X"})
+		}
+	}
+}
+
+func Part2b(input string) int {
+	var loc Loc
+	grid := inputs.ToGrid2D(input, "\n", "", Point{}, func(c string) Point { return Point{dirs: make([]Direction, 1), display: c} })
+	for x := 0; x < grid.SizeX(); x++ {
+		for y := 0; y < grid.SizeY(); y++ {
+			if grid.Get(x, y).display == "^" {
+				loc = Loc{dir: Up, pos: Pos{x: x, y: y}}
+			}
+			if grid.Get(x, y).display == "v" {
+				loc = Loc{dir: Down, pos: Pos{x: x, y: y}}
+			}
+			if grid.Get(x, y).display == ">" {
+				loc = Loc{dir: Right, pos: Pos{x: x, y: y}}
+			}
+			if grid.Get(x, y).display == "<" {
+				loc = Loc{dir: Left, pos: Pos{x: x, y: y}}
+			}
+		}
+	}
+	fmt.Println(grid.Matrix())
+	fmt.Printf("%v\n", loc)
+	point := grid.Get(loc.pos.x, loc.pos.y)
+	grid.Set(loc.pos.x, loc.pos.y, Point{dirs: append(point.dirs, Up), display: "X"})
+	loc.count = 0
+	for {
+		_, _, err := move2(&loc, grid)
+		if err != nil {
+			break
+		}
+		if contains(loc.dir, grid.Get(loc.pos.x, loc.pos.y)) {
+			loc.count++
+			break
+		}
+	}
+	return loc.count
+}
+
+func move1(loc *Loc, grid *grid2d.Grid[string]) int {
+	return -1
+}
+
+func move2(loc *Loc, grid *grid2d.Grid[Point]) (int, int, error) {
+	x, y, err := doMove(loc, grid)
+	if err != nil {
+		return x, y, err
+	}
+	if x == loc.pos.x && y == loc.pos.y {
+		move2(loc, grid)
+	}
+	return x, y, nil
+}
+
+func canBlock(loc *Loc, point Point) bool {
+	val := false
+	switch loc.dir {
+	case Up:
+		if contains(Right, point) {
+			val = true
+		}
+	case Down:
+		if contains(Left, point) {
+			val = true
+		}
+	case Left:
+		if contains(Up, point) {
+			val = true
+		}
+	case Right:
+		if contains(Down, point) {
+			val = true
+		}
+	}
+	return val
+}
+
+func contains(v Direction, point Point) bool {
+	for _, d := range point.dirs {
+		if d == v {
+			return true
+		}
+	}
+	return false
+}
+
+func checkMove(loc *Loc, grid *grid2d.Grid[string]) bool {
+	switch loc.dir {
+	case Down:
+		if loc.pos.y+1 >= grid.SizeY() {
+			return false
+		}
+		if grid.Get(loc.pos.x, loc.pos.y+1) == "#" {
+			loc.dir = Left
+		} else {
+			loc.pos.y++
+		}
+	case Up:
+		if loc.pos.y-1 < 0 {
+			return false
+		}
+		if grid.Get(loc.pos.x, loc.pos.y-1) == "#" {
+			loc.dir = Right
+		} else {
+			loc.pos.y--
+		}
+	case Left:
+		if loc.pos.x-1 < 0 {
+			return false
+		}
+		if grid.Get(loc.pos.x-1, loc.pos.y) == "#" {
+			loc.dir = Up
+		} else {
+			loc.pos.x--
+		}
+	case Right:
+		if loc.pos.x+1 >= grid.SizeX() {
+			return false
+		}
+		if grid.Get(loc.pos.x+1, loc.pos.y) == "#" {
+			loc.dir = Down
+		} else {
+			loc.pos.x++
+		}
+	}
+	return true
+}
+
+func doMove(loc *Loc, grid *grid2d.Grid[Point]) (int, int, error) {
+	x := loc.pos.x
+	y := loc.pos.y
+	switch loc.dir {
+	case Down:
+		if loc.pos.y+1 >= grid.SizeY() {
+			return x, y, fmt.Errorf("outside")
+		}
+		if grid.Get(loc.pos.x, loc.pos.y+1).display == "#" {
+			loc.dir = Left
+		} else {
+			loc.pos.y++
+		}
+	case Up:
+		if loc.pos.y-1 < 0 {
+			return x, y, fmt.Errorf("outside")
+		}
+		if grid.Get(loc.pos.x, loc.pos.y-1).display == "#" {
+			loc.dir = Right
+		} else {
+			loc.pos.y--
+		}
+	case Left:
+		if loc.pos.x-1 < 0 {
+			return x, y, fmt.Errorf("outside")
+		}
+		if grid.Get(loc.pos.x-1, loc.pos.y).display == "#" {
+			loc.dir = Up
+		} else {
+			loc.pos.x--
+		}
+	case Right:
+		if loc.pos.x+1 >= grid.SizeX() {
+			return x, y, fmt.Errorf("outside")
+		}
+		if grid.Get(loc.pos.x+1, loc.pos.y).display == "#" {
+			loc.dir = Down
+		} else {
+			loc.pos.x++
+		}
+	}
+	return x, y, nil
+}

2024/go/day06/day06_test.go

@@ -0,0 +1,35 @@
+package day06
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1(`....#.....
+.........#
+..........
+..#.......
+.......#..
+..........
+.#..^.....
+........#.
+#.........
+......#...`)
+	require.Equal(t, 41, r)
+}
+
+func TestPart2(t *testing.T) {
+	r := Part2(`....#.....
+.........#
+..........
+..#.......
+.......#..
+..........
+.#..^.....
+........#.
+#.........
+......#...`)
+	require.Equal(t, 6, r)
+}

2024/go/day06/input.txt

@@ -0,0 +1,130 @@
+...#..................#...................#......................#..............................#.............................#...
+....#.......................#........#.#..............##...........#.....#..........#..........................#..................
+.............#........................................................................#.........#.#..#..#..........#..............
+..........#.......#..........#..................#........##...................#..............#....................................
+....................#..........................................................#..#.....................................#.........
+....#............................#..............................................#.....................#..........##....#..........
+.......#.............#......................................................................#.............#.........#.............
+....###......................#....#...........#.....#................................#..........................#.................
+..........#..#...........#..#........................................................#.....#...........#................#.........
+..#....#......#....#....#...................................................................#.....................................
+....................#............#............................................#......#....#...............................#.......
+..........#.......#.........#.......#.............................................................................................
+.......#...#.......................................#...................#..........................................................
+.......#........#............................#.....#.......#..............................................#..................#...#
+.....................#.................................#................#...#...............#.....#.#..........................#..
+.....#..........................................#......................#.............##..............................#........#...
+.....#......#.........................#..........................#..........................................................#..#..
+.#......#.............#......#.................................................#.....#...................##......#................
+.............................................................................##...................................................
+........................................#.......................................#........#.............................#.#.......#
+...........#.....................................#.............................#......#......#..#....................#..#.........
+.............................................#.......................#..................##....#.....#.............................
+........................#..............................................................#..........................................
+#..............#.........................#........#...#...............#..............#..................#....................##...
+...#...#.............................#.......#................................................#........................#....#.....
+.....#.........................#..#.......................#..........#.....................#..................#.#.....#...........
+..................#........#..#.......#...................................................................................#....#..
+..#...#...............................................#.#..#........................................................#....#......#.
+...............#...............#..........................#............................#..........#.............#.................
+............#.....#........#.........................................................#........#........#.....#........#......#....
+............................#.........#....#........#.....#...#.............#.................................#...................
+........#..................#....#..........................................................#.#.#..................................
+....................................................................................................................#.............
+#............#.............#..................#......................................................................#............
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2024/go/day07/day07.go

@@ -0,0 +1,140 @@
+package day07
+
+import (
+	"adventofcode2024/utils"
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+type Op int
+
+const (
+	Add Op = iota
+	Mul
+	Conc
+)
+
+func Part1(input string) int {
+	val := 0
+	lines := strings.Split(input, "\n")
+	for _, line := range lines {
+		parts := strings.Split(line, ":")
+		result := utils.MustAtoi(parts[0])
+		numStrings := strings.Fields(parts[1])
+		var numbers []int
+		for _, numStr := range numStrings {
+			num := utils.MustAtoi(numStr)
+			numbers = append(numbers, num)
+		}
+		bitmask := 1 << (len(numbers) - 1)
+		for i := 0; i < bitmask; i++ {
+			calc := 0
+			switch isNthBitSet(i, 0) {
+			case true:
+				calc = numbers[0] + numbers[1]
+			case false:
+				calc = numbers[0] * numbers[1]
+			}
+
+			for n := 1; n < len(numbers)-1; n++ {
+				switch isNthBitSet(i, n) {
+				case true:
+					calc = calc + numbers[n+1]
+				case false:
+					calc = calc * numbers[n+1]
+				}
+			}
+			if calc == result {
+				fmt.Printf("result: %v numbers:%v  count: %d\n", result, numbers, bitmask)
+				val += result
+				break
+			}
+		}
+	}
+	return val
+}
+
+func Part2(input string) int {
+	val := 0
+	lines := strings.Split(input, "\n")
+	for _, line := range lines {
+		parts := strings.Split(line, ":")
+		result := utils.MustAtoi(parts[0])
+		numStrings := strings.Fields(parts[1])
+		var numbers []int
+		for _, numStr := range numStrings {
+			num := utils.MustAtoi(numStr)
+			numbers = append(numbers, num)
+		}
+		operations := []Op{Add, Mul, Conc}
+		results := [][]Op{}
+		generatePermutations(operations, len(numbers)-1, []Op{}, &results)
+		for _, op := range results {
+			calc := 0
+			switch op[0] {
+			case Add:
+				calc = numbers[0] + numbers[1]
+			case Mul:
+				calc = numbers[0] * numbers[1]
+			case Conc:
+				calc = concat(numbers[0], numbers[1])
+			}
+
+			for n := 1; n < len(numbers)-1; n++ {
+				switch op[n] {
+				case Add:
+					calc = calc + numbers[n+1]
+				case Mul:
+					calc = calc * numbers[n+1]
+				case Conc:
+					calc = concat(calc, numbers[n+1])
+				}
+			}
+			if calc == result {
+				fmt.Printf("result: %v numbers:%v\n", result, numbers)
+				val += result
+				break
+			}
+		}
+	}
+	return val
+}
+
+func isNthBitSet(num, n int) bool {
+	return num&(1<<n) != 0
+}
+
+func getOp(row, col int) Op {
+	vals := []Op{Add, Mul, Conc}
+	// Column 0 cycles as row / 3
+	if col == 0 {
+		return vals[row/3]
+	}
+	// Column 1 cycles as row % 3
+	return vals[row%3]
+}
+
+// Recursive function to generate permutations
+func generatePermutations(ops []Op, n int, prefix []Op, results *[][]Op) {
+	if n == 0 {
+		// Append a copy of the current prefix to the results
+		*results = append(*results, append([]Op{}, prefix...))
+		return
+	}
+
+	// Iterate over all operations and build the combinations
+	for _, op := range ops {
+		generatePermutations(ops, n-1, append(prefix, op), results)
+	}
+}
+
+func concat(a, b int) int {
+	aStr := strconv.Itoa(a)
+	bStr := strconv.Itoa(b)
+
+	concatStr := aStr + bStr
+
+	result, _ := strconv.Atoi(concatStr)
+	return result
+}

2024/go/day07/day07_test.go

@@ -0,0 +1,47 @@
+package day07
+
+import (
+	"testing"
+	"github.com/stretchr/testify/require"
+	"fmt"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1(`190: 10 19
+3267: 81 40 27
+83: 17 5
+156: 15 6
+7290: 6 8 6 15
+161011: 16 10 13
+192: 17 8 14
+21037: 9 7 18 13
+292: 11 6 16 20`)
+	require.Equal(t, 3749, r)
+}
+
+func TestPart2(t *testing.T) {
+	r := Part2(`190: 10 19
+3267: 81 40 27
+83: 17 5
+156: 15 6
+7290: 6 8 6 15
+161011: 16 10 13
+192: 17 8 14
+21037: 9 7 18 13
+292: 11 6 16 20`)
+	require.Equal(t, 11387, r)
+}
+
+func TestGetOp(t *testing.T) {
+	operations := []Op{Add, Mul, Conc} // Define the operations
+    X := 3 // Define the number of positions (columns)
+
+    // Start the recursive generation with an empty prefix
+	results := [][]Op{}
+    generatePermutations(operations, X, []Op{}, &results)
+	for _, op := range results {
+		fmt.Printf("%v\n", op)
+	}
+	r := Add
+	require.Equal(t, Add, r)
+}

2024/go/day07/input.txt

@@ -0,0 +1,850 @@
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+18842130: 997 20 24 362 50 30
+933: 11 824 8 3 87
+100362657: 9 3 2 6 375 988 3 3 8 4 1
+125631197: 7 8 1 2 92 6 9 72 1 563 2
+16965: 936 759 2 5 8
+63221509696: 76 214 5 4 340 89 8 8
+175095120: 66 4 1 5 6 10 184 6 3 8 5
+5948579768: 69 5 3 2 6 5 44 93 3 8 4 3
+612455: 6 4 1 638 251 2 8 3 1 9 6
+35828415: 6 4 1 7 9 779 2 22 5 4 5 7
+1423570: 77 835 65 4 6 1 849
+139702935: 55 8 4 5 5 6 4 90 2 935
+521072: 148 8 55 9 5 8
+42845205: 9 110 6 54 47 5
+155790: 8 558 97 18 1
+347911604818: 91 6 354 22 44 2 9 9 8 8
+196579: 1 9 15 15 129 2 19 499
+178336116: 5 53 16 4 522 6 6
+211784: 352 6 6 22 4
+357611951: 9 19 8 1 613 463 7 3 3 5
+2856: 6 31 29 54 4
+3115653: 8 404 964 5
+139573401: 1 34 1 142 33 851 891
+2731: 3 107 8 1 8 8 80 3
+1635930605522: 8 5 9 6 8 137 7 94 604 2
+2517747584: 8 1 3 715 424 5 755 1 9
+13551: 8 9 6 589 4
+8640: 9 60 9
+246434062: 6 18 632 93 960 87 62
+844073: 298 57 899 67 7 47
+14942463139: 169 883 197 631 39
+70584888: 8 8 23 8 888
+66176064187: 882 7 833 5 9 17 2 7 5 3
+54955: 54 95 5
+1683752: 417 2 9 562 7
+31395181: 94 497 1 1 672 9 4
+418453: 9 7 19 1 1 349 2
+737204: 8 1 4 189 9 3 86 4 5 5 1 3

2024/go/day08/day08.go

@@ -0,0 +1,168 @@
+package day08
+
+import (
+	"adventofcode2024/utils/grid2d"
+	"adventofcode2024/utils/inputs"
+	"fmt"
+)
+
+type loc struct {
+	x int
+	y int
+}
+
+type pt struct {
+	display   rune
+	antinodes int
+	paired    map[loc]pt
+	visited   map[rune]bool
+}
+
+func Part1(input string) int {
+	grid := inputs.ToGrid2D(input, "\n", "", pt{display: '.'}, func(c string) pt { return pt{display: rune(c[0]), paired: make(map[loc]pt), visited: make(map[rune]bool)} })
+	for x1 := 0; x1 < grid.SizeX(); x1++ {
+		for y1 := 0; y1 < grid.SizeY(); y1++ {
+			pt1 := grid.Get(x1, y1)
+			if pt1.display != '.' {
+				for x2 := 0; x2 < grid.SizeX(); x2++ {
+					for y2 := 0; y2 < grid.SizeY(); y2++ {
+						pt2 := grid.Get(x2, y2)
+						if x1 != x2 && y1 != y2 && pt1.display == pt2.display && !isPaired(x1, y1, pt1, pt2) {
+							pt1.paired[loc{x: x2, y: y2}] = pt2
+							pt2.paired[loc{x: x1, y: y1}] = pt1
+						}
+					}
+				}
+			}
+		}
+	}
+	for x := 0; x < grid.SizeX(); x++ {
+		for y := 0; y < grid.SizeY(); y++ {
+			pt1 := grid.Get(x, y)
+			if pt1.display != '.' {
+				for ploc := range pt1.paired {
+					addAntiNodes(x, y, ploc.x, ploc.y, grid)
+				}
+			}
+		}
+	}
+	antinodes := 0
+	for x := 0; x < grid.SizeX(); x++ {
+		for y := 0; y < grid.SizeY(); y++ {
+			pt := grid.Get(x, y)
+			if pt.antinodes > 0 {
+				antinodes++
+			}
+		}
+	}
+	return antinodes
+}
+
+func Part2(input string) int {
+	grid := inputs.ToGrid2D(input, "\n", "", pt{display: '.'}, func(c string) pt { return pt{display: rune(c[0]), paired: make(map[loc]pt), visited: make(map[rune]bool)}})
+	for x1 := 0; x1 < grid.SizeX(); x1++ {
+		for y1 := 0; y1 < grid.SizeY(); y1++ {
+			pt1 := grid.Get(x1, y1)
+			if pt1.display != '.' {
+				for x2 := 0; x2 < grid.SizeX(); x2++ {
+					for y2 := 0; y2 < grid.SizeY(); y2++ {
+						pt2 := grid.Get(x2, y2)
+						if x1 != x2 && y1 != y2 && pt1.display == pt2.display && !isPaired(x1, y1, pt1, pt2) {
+							pt1.paired[loc{x: x2, y: y2}] = pt2
+							pt2.paired[loc{x: x1, y: y1}] = pt1
+							pt1.antinodes++
+							pt2.antinodes++
+							grid.Set(x1, y1, pt1)
+							grid.Set(x2, y2, pt2)
+						}
+					}
+				}
+			}
+		}
+	}
+	for x := 0; x < grid.SizeX(); x++ {
+		for y := 0; y < grid.SizeY(); y++ {
+			pt1 := grid.Get(x, y)
+			if pt1.display != '.' {
+				for ploc := range pt1.paired {
+					addAntiNodes_p2(pt1.display, x, y, ploc.x, ploc.y, grid)
+				}
+			}
+		}
+	}
+	antinodes := 0
+	fmt.Printf("%v\n", grid.StringWithFormatter(formatter))
+	for x := 0; x < grid.SizeX(); x++ {
+		for y := 0; y < grid.SizeY(); y++ {
+			pt := grid.Get(x, y)
+			if pt.antinodes > 0 {
+				antinodes++
+			} else {
+				if pt.display != '.' { antinodes++ }
+			}
+		}
+	}
+	return antinodes
+}
+
+func formatter(p pt, x int, y int) string {
+	if p.antinodes > 0 { 
+		return "#"
+	}
+	return "."
+}
+
+func isPaired(x int, y int, p1 pt, pt2 pt) bool {
+	return p1.paired[loc{x: x, y: y}].display == pt2.display
+}
+
+func addAntiNodes(x1 int, y1 int, x2 int, y2 int, grid *grid2d.Grid[pt]) {
+	px1, py1, px2, py2 := offsetPoints(x1, y1, x2, y2)
+
+	if px1 < 0 || px1 >= grid.SizeX() || py1 < 0 || py1 >= grid.SizeY() {
+		return
+	}
+	pt1 := grid.Get(px1, py1)
+	pt1.antinodes++
+	grid.Set(px1, py1, pt1)
+	if px2 < 0 || px2 >= grid.SizeX() || py2 < 0 || py2 >= grid.SizeY() {
+		return
+	}
+	pt2 := grid.Get(px2, py2)
+	pt2.antinodes++
+	grid.Set(px2, py2, pt2)
+}
+
+func addAntiNodes_p2(frequency rune, x1 int, y1 int, x2 int, y2 int, grid *grid2d.Grid[pt]) {
+	px1, py1, px2, py2 := offsetPoints(x1, y1, x2, y2)
+	if !(px1 < 0 || px1 >= grid.SizeX() || py1 < 0 || py1 >= grid.SizeY()) {
+		pt1 := grid.Get(px1, py1)
+		if !pt1.visited[frequency] {
+			pt1.antinodes++
+			pt1.visited[frequency] = true
+			grid.Set(px1, py1, pt1)
+			addAntiNodes_p2(frequency, x1, y1, px1, py1, grid)
+		}
+	}
+	if !(px2 < 0 || px2 >= grid.SizeX() || py2 < 0 || py2 >= grid.SizeY()) {
+		pt2 := grid.Get(px2, py2)
+		if !pt2.visited[frequency] {
+			pt2.antinodes++
+			pt2.visited[frequency] = true
+			grid.Set(px2, py2, pt2)
+			addAntiNodes_p2(frequency, x2, y2, px2, py2, grid)
+		}
+	}
+}
+
+// Function to calculate two points symmetrically placed above and below the line
+func offsetPoints(x1, y1, x2, y2 int) (int, int, int, int) {
+	dx := x1 - x2
+	dy := y1 - y2
+
+	p1x := x1 + dx
+	p1y := y1 + dy
+	p2x := x2 - dx
+	p2y := y2 - dy
+	return p1x, p1y, p2x, p2y
+}

2024/go/day08/day08_test.go

@@ -0,0 +1,39 @@
+package day08
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1(`............
+........0...
+.....0......
+.......0....
+....0.......
+......A.....
+............
+............
+........A...
+.........A..
+............
+............`)
+	require.Equal(t, 14, r)
+}
+
+func TestPart2(t *testing.T) {
+	r := Part2(`............
+........0...
+.....0......
+.......0....
+....0.......
+......A.....
+............
+............
+........A...
+.........A..
+............
+............`)
+	require.Equal(t, 34, r)
+}

2024/go/day08/input.txt

@@ -0,0 +1,50 @@
+.....y..........................p................r
+........I.........................................
+......................4.s.........................
+..........4.......................................
+....y.............................................
+......................................p.........r.
+..........0..s......N..................1.....p....
+..y........4.......................p..............
+...............0..................................
+..............0....t....N....h....................
+.............N....................................
+......j...................s............H...l..O...
+..........q.................H................O....
+..f...e.qj.....y...0..............................
+...........t..........................k..Q..r.....
+.........6................Q..s...x......W.........
+....2..b...e....t..4.........c.....xW.j...........
+...e....................w................1.....O..
+..e..j..5...........................c.............
+.........B..2...............MK................H...
+...2......b...g..X...q..........h...............O.
+...q...2..........m....k...i...............QV.x...
+...................i.........W.k.............HQ...
+........b...X...............D..........c...N......
+................................l..........h.....I
+.m...........g......l.......c.............3......V
+....X.......m........g...V.K...7......F.d.........
+.........b.X...U..........................C.......
+.....................l..............o.1....C......
+............u.............K..............3...d....
+......................i.T....f................V...
+..............................1.k.................
+.B.....E......9..m....K..5.M......................
+...P...............M...95....o..i........I........
+...............................S......3......wI...
+.....EP...........9........5..T.R.................
+.P..........v..9......f.............R.Co..w3......
+..........h...SG..v.E...7..f.T....................
+..........6..........L.................Y.......d..
+..........B...............U........D..............
+....B................U.....8..M....n...J..........
+.........................L................Fw......
+....L6E.P.................7.UG....J.....Y.D.......
+........t........v...SJ........n..d...............
+......................8v.....uG...................
+..................L.....n.........................
+...............T..............n......D............
+..............o.........8................J.Y.R....
+..................S...............u....F.......R..
+........6..............u.....7.8..........Y..F....

2024/go/day09/day09.go

@@ -0,0 +1,117 @@
+package day09
+
+import (
+	"adventofcode2024/utils"
+	"fmt"
+)
+
+func Part1(input string) int {
+	disk := []int{}
+	file_id := 0
+	for i := 0; i <= len(input); i++ {
+		for x := 0; x < utils.MustAtoi(string(input[i])); x++ {
+			disk = append(disk, file_id)
+		}
+		i++
+		if i < len(input) {
+			for x := 0; x < utils.MustAtoi(string(input[i])); x++ {
+				disk = append(disk, -1)
+			}
+		}
+		file_id++
+	}
+	
+	printDisk(disk)
+
+	for i:=len(disk)-1;i>0;i--{
+		if disk[i] != -1 {
+			id := disk[i]
+			disk[i] = -1
+			for j:=0;j<=len(disk);j++ {
+				if disk[j] == -1 {
+					disk[j] = id
+					break
+				}
+			}
+		}
+	}
+	printDisk(disk)
+
+	checksum := 0
+	for i:=0;i<len(disk);i++ {
+		if disk[i] != -1 {
+			checksum += i * disk[i]
+		}
+	}
+	return checksum
+}
+
+func Part2(input string) int {
+	disk := []int{}
+	file_id := 0
+	for i := 0; i <= len(input); i++ {
+		for x := 0; x < utils.MustAtoi(string(input[i])); x++ {
+			disk = append(disk, file_id)
+		}
+		i++
+		if i < len(input) {
+			for x := 0; x < utils.MustAtoi(string(input[i])); x++ {
+				disk = append(disk, -1)
+			}
+		}
+		file_id++
+	}
+	
+	printDisk(disk)
+
+	for i:=len(disk)-1;i>0;i--{
+		size := 0
+		if disk[i] != -1 {
+			id := disk[i]
+			for {
+				if i-size > 0 && disk[i-size] == id {
+					size++
+				} else {
+					break
+				}
+			}
+			free := 0
+			j := 0
+			found := false
+			for ;j<i && free < size;j++{
+				if disk[j] != -1 { 
+					free = 0
+					continue 
+				}
+				free++
+				if free == size { found = true }
+			}
+			if found {
+				for k:=0;k<size;k++ {
+					disk[i-k] = -1
+					disk[j-size+k] = id
+				}
+//				printDisk(disk)
+			}
+			i -= (size -1)
+			
+		}
+	}
+	printDisk(disk)
+
+	checksum := 0
+	for i:=0;i<len(disk);i++ {
+		if disk[i] != -1 {
+			checksum += i * disk[i]
+		}
+	}
+	return checksum}
+
+func printDisk(disk []int) {
+	for _, x := range disk {
+		if x == -1 {fmt.Print(".")} else {
+			fmt.Printf("%d", x)
+		}
+	}
+	fmt.Print("\n")
+}

2024/go/day09/day09_test.go

@@ -0,0 +1,17 @@
+package day09
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1("2333133121414131402")
+	require.Equal(t,1928, r)
+}
+
+func TestPart2(t *testing.T) {
+	r := Part2("2333133121414131402")
+	require.Equal(t, 2858, r)
+}

2024/go/day10/day10.go

@@ -0,0 +1,103 @@
+package day10
+
+import (
+	"adventofcode2024/utils"
+	"adventofcode2024/utils/grid2d"
+	"adventofcode2024/utils/inputs"
+	"fmt"
+)
+
+type Position struct {
+	height int
+	summit bool
+}
+
+func Part1(input string) int {
+	score := 0
+	i := 0
+	grid := inputs.ToGrid2D(input, "\n", "", Position{height: -1}, func(c string) Position { return Position{summit: false, height: utils.MustAtoi(c)} })
+	fmt.Println(grid.StringWithFormatter(formatter))
+	for y := 0; y < grid.SizeY(); y++ {
+		for x := 0; x < grid.SizeX(); x++ {
+			position := grid.Get(x, y)
+			if position.height != 0 {
+				continue
+			}
+			wipe_summit(grid)
+			score += getScore(x, y, 0, 0, grid)
+			fmt.Printf("Trailhead %d (%d,%d) paths: %d\n", i, x, y, score)
+			i++
+		}
+	}
+	return score
+}
+
+func Part2(input string) int {
+	score := 0
+	i := 0
+	grid := inputs.ToGrid2D(input, "\n", "", Position{height: -1}, func(c string) Position { return Position{summit: false, height: utils.MustAtoi(c)} })
+	fmt.Println(grid.StringWithFormatter(formatter))
+	for y := 0; y < grid.SizeY(); y++ {
+		for x := 0; x < grid.SizeX(); x++ {
+			position := grid.Get(x, y)
+			if position.height != 0 {
+				continue
+			}
+			wipe_summit(grid)
+			score += getScore2(x, y, 0, 0, grid)
+			fmt.Printf("Trailhead %d (%d,%d) paths: %d\n", i, x, y, score)
+			i++
+		}
+	}
+	return score
+}
+
+func formatter(p Position, x int, y int) string {
+	return fmt.Sprintf("%v", p.height)
+}
+
+func wipe_summit(grid *grid2d.Grid[Position]) {
+	for y := 0; y < grid.SizeY(); y++ {
+		for x := 0; x < grid.SizeX(); x++ {
+			pos := grid.Get(x, y)
+			if pos.height == 9 && pos.summit {
+				pos.summit = false
+				grid.Set(x, y, pos)
+			}
+		}
+	}
+}
+
+func getScore(x, y, level, score int, grid *grid2d.Grid[Position]) int {
+	directions := [][]int{{0, 1}, {0, -1}, {1, 0}, {-1, 0}}
+	for _, dir := range directions {
+		x1 := x + dir[0]
+		y1 := y + dir[1]
+		nposition := grid.Get(x1, y1)
+		if level == 8 && nposition.height == 9 {
+			score++
+		}
+		if nposition.height != level+1 {
+			continue
+		}
+		score = getScore(x1, y1, nposition.height, score, grid)
+	}
+	return score
+}
+
+func getScore2(x, y, level, score int, grid *grid2d.Grid[Position]) int {
+	directions := [][]int{{0, 1}, {0, -1}, {1, 0}, {-1, 0}}
+	for _, dir := range directions {
+		x1 := x + dir[0]
+		y1 := y + dir[1]
+		nposition := grid.Get(x1, y1)
+		if level == 8 && nposition.height == 9 {
+			score++
+		}
+		if nposition.height != level+1 {
+			continue
+		}
+		score = getScore2(x1, y1, nposition.height, score, grid)
+	}
+	return score
+}

2024/go/day10/day10_test.go

@@ -0,0 +1,31 @@
+package day10
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1(`89010123
+78121874
+87430965
+96549874
+45678903
+32019012
+01329801
+10456732`)
+	require.Equal(t, 36, r)
+}
+
+func TestPart2(t *testing.T) {
+	r := Part2(`89010123
+78121874
+87430965
+96549874
+45678903
+32019012
+01329801
+10456732`)
+	require.Equal(t, 81, r)
+}

2024/go/day10/input.txt

@@ -0,0 +1,56 @@
+43217654309879876104563234589896761012345656543098901001
+34108903212368123233472105676787851299856567832187812652
+45677814301457014312986345589876940387765678943046543743
+56789325100876525800345276430105432456566589858956769821
+65438456912963436901236187621234501223455410767349874430
+74321067803451107898547093412012982016764323101210143561
+89412210987430210789698892102123673107895214589723652678
+78601521856521345678721743089034543212345605679854781789
+66789430545678934505430654898745672212236765434765690878
+55676545038943213216765989601654981300129870121012345969
+46543216127657804389834808762347690456789983498141456452
+65454307233456934870126712354878765565210012507230987321
+54567898332110125961015645403969234674323215616546576010
+65658983021001876854324106912452128789321308723455678901
+76543212137892965348933217832141089873410419678964987652
+89862901236543501267018363101033210565566566569873788543
+89871876544345652106529854892123521454479877654012699830
+78100703454278743212434763763014672343287778943210581021
+65210212565189858906763212654985785650198961212101432010
+54321056876012567875898708783476698763267890303215678321
+87012567988703489874345679692676543294986725456574329478
+96543498589876530365210189501987650187675216987687610569
+01234567651010921234501076401236501010564307678596789876
+10389830532329854376542345321545692323403018789455430965
+21456721013456765289031234980098783410912129670320121054
+92505432565421010109120345671107654567823451061210120123
+87615443478302341018750134543234541050765962552121234984
+34322342189219650129665234789432132021894873443010965673
+45451056077828743234574343276543032134703210523457876532
+51069987456943104545987650167898749865612309610765454101
+32678678345652210698092156756547056764303458779890363232
+43010589232781306787183045876532178965210569888211274321
+56923432101090458989254234923421369878934678898302989430
+87889211078764567876360143010030450767125986567401276589
+96676305669653478985478652102141341458076803456564345676
+45435434734522780340349760123456232349883712678178737894
+80127821821011091211299854354987101016792103549069016323
+92346940910329654304587121267807652345013401232108925412
+81055432101458765643671010871018947654324589543987432101
+76567789023467010782532346965425638945695678654986540012
+05498654110567821891047897212334721032786014345678901098
+12387013223489932346156598101549889821012823216765212387
+03456323016576542345692367210678710701296954907854323456
+12345465437895431016781450123467623654387867878985401501
+21089870124326528701670101874345634565676541045621032012
+32189210065017019632543210965236730120545632456734548743
+43498349876298903545450143050159821321234012349895699654
+34567658389101232123469052101567634489234510106786789985
+99876501276788943016578769872498105672105621215021058876
+87035432365897654107689898763343234321678789334134567655
+70129641034781089898791099854232145690569245493254321567
+63238701123654178718982387763156056781410126787655010498
+54345652321073265001073456012047189872328901098546710327
+34568543434589874132569895145438976987437812361239891210
+21879654898678013203456701236327805456546521450967890123
+30968745467654320112345210987610112345545430567856543234

2024/go/day11/day11.go

@@ -0,0 +1,76 @@
+package day11
+
+import (
+	"adventofcode2024/utils"
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+func Part1(input string) int {
+	stones := strings.Fields(input)
+	for i := 0; i < 25; i++ {
+		n_stones := []string{}
+		for _, stone := range stones {
+			switch {
+			case stone == "0":
+				n_stones = append(n_stones, "1")
+			case len(stone)%2 == 0:
+				d1 := strconv.Itoa(utils.MustAtoi(stone[0 : len(stone)/2]))
+				d2 := strconv.Itoa(utils.MustAtoi(stone[len(stone)/2:]))
+				n_stones = append(n_stones, d1)
+				n_stones = append(n_stones, d2)
+
+			default:
+				n_stones = append(n_stones, fmt.Sprintf("%d", utils.MustAtoi(stone)*2024))
+			}
+		}
+		stones = n_stones
+	}
+	return len(stones)
+}
+
+func Part2(input string) int {
+	stones := strings.Fields(input)
+	smap := make(map[string]int)
+	smap2 := make(map[string]int)
+
+	for _, stone := range stones {
+		smap[stone] = 1
+	}
+	for i:=0;i<75;i++ {
+		for k, v := range smap {
+			switch {
+			case k == "0":
+				smap2["1"] = smap2["1"] + v
+			case len(k)%2 == 0:
+				d1 := strconv.Itoa(utils.MustAtoi(k[0 : len(k)/2]))
+				d2 := strconv.Itoa(utils.MustAtoi(k[len(k)/2:]))
+				smap2[d1] += v
+				smap2[d2] += v
+			default:
+				k2 := fmt.Sprintf("%d", utils.MustAtoi(k)*2024)
+				smap2[k2] += v
+			}
+		}
+		smap = CopyMap(smap2)
+		smap2 = make(map[string]int)
+	}
+	count := 0
+	for _, v := range smap {
+		count += v
+	}
+	return count
+}
+
+func CopyMap(original map[string]int) map[string]int {
+    // Create a new map to hold the copy
+    copied := make(map[string]int)
+    
+    // Copy each key-value pair from the original map to the new map
+    for key, value := range original {
+        copied[key] = value
+    }
+    
+    return copied
+}

2024/go/day11/day11_test.go

@@ -0,0 +1,17 @@
+package day11
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1("125 17")
+	require.Equal(t, 55312, r)
+}
+
+func TestPart2(t *testing.T) {
+	r := Part2("125 17")
+	require.Equal(t, 55312, r)
+}

2024/go/day11/input.txt

@@ -0,0 +1 @@
+3 386358 86195 85 1267 3752457 0 741

2024/go/day12/day12.go

@@ -0,0 +1,146 @@
+package day12
+
+import (
+	"adventofcode2024/utils/grid2d"
+	"adventofcode2024/utils/inputs"
+	"fmt"
+
+)
+
+type Plot struct {
+	crop    string
+	visited bool
+	region  int
+	x		int
+	y 		int
+}
+
+type Region struct {
+	plots      []Plot
+	crop       string
+	id         int
+	area       int
+	perimteter int
+	sides      int
+}
+
+func Part1(input string) int {
+	var val int
+	region_id := 0
+	regions := make(map[int]Region)
+	grid := inputs.ToGrid2D(input, "\n", "", Plot{}, func(c string) Plot { return Plot{crop: c, region: -1} })
+	fmt.Println(grid.StringWithFormatter(formatter))
+	for y := 0; y < grid.SizeY(); y++ {
+		for x := 0; x < grid.SizeX(); x++ {
+			var region Region
+			plot := grid.Get(x, y)
+			if plot.visited {
+				continue
+			}
+
+			region_id++
+			region = Region{id: region_id, area: 1, crop: plot.crop, sides: 4}
+			plot.region = region_id
+			plot.visited = true
+			plot.x = x
+			plot.y = y
+			grid.Set(x, y, plot)
+			region.plots = append(region.plots, plot)
+			regions[region_id] = region
+
+			try_neighours(grid, &region, x, y)
+			regions[region.id] = region
+		}
+	}
+	for _, region := range regions {
+		val += region.area * region.perimteter
+	}
+	return val
+}
+
+func Part2(input string) int {
+	var val int
+	region_id := 0
+	regions := make(map[int]Region)
+	grid := inputs.ToGrid2D(input, "\n", "", Plot{}, func(c string) Plot { return Plot{crop: c, region: -1} })
+	fmt.Println(grid.StringWithFormatter(formatter))
+	for y := 0; y < grid.SizeY(); y++ {
+		for x := 0; x < grid.SizeX(); x++ {
+			var region Region
+			plot := grid.Get(x, y)
+			if plot.visited {
+				continue
+			}
+
+			region_id++
+			region = Region{id: region_id, area: 1, crop: plot.crop}
+			plot.region = region_id
+			plot.visited = true
+			plot.x = x
+			plot.y = y
+			grid.Set(x, y, plot)
+			region.plots = append(region.plots, plot)
+			regions[region_id] = region
+
+			try_neighours(grid, &region, x, y)
+			regions[region.id] = region
+		}
+	}
+	for _, region := range regions {
+		val += region.area * get_sides(grid, region)
+	}
+	return val
+}
+
+func formatter(p Plot, x int, y int) string {
+	return fmt.Sprintf("%v", p.crop)
+}
+
+func try_neighours(grid *grid2d.Grid[Plot], region *Region, x int, y int) {
+
+	directions := [][]int{{0, 1}, {0, -1}, {1, 0}, {-1, 0}}
+	plot := grid.Get(x, y)
+	perimeters := 0
+
+	for _, dir := range directions {
+		x1 := x + dir[0]
+		y1 := y + dir[1]
+		nplot := grid.Get(x1, y1)
+
+		if nplot.crop == plot.crop {
+			if !nplot.visited {
+				region.area++
+				nplot.visited = true
+				nplot.region = plot.region
+				nplot.x = x1
+				nplot.y = y1
+				grid.Set(x1, y1, nplot)
+				region.plots = append(region.plots, nplot)
+				try_neighours(grid, region, x1, y1)
+			}
+		} else {
+			perimeters++
+		}
+	}
+}
+
+func get_sides(grid *grid2d.Grid[Plot], region Region) int {
+	sides := 0	
+	corners := [][][]int{{{-1, 0}, {0, -1}, {-1, -1}},
+					     {{+1, 0}, {0, -1}, {+1, -1}},
+					     {{-1, 0}, {0, +1}, {-1, +1}},
+					     {{+1, 0}, {0, +1}, {+1, +1}}}
+	for _, plot := range region.plots {
+		for _, o_corners := range corners {
+				c1 := grid.Get(plot.x + o_corners[0][0], plot.y + o_corners[0][1])
+				c2 := grid.Get(plot.x + o_corners[1][0], plot.y + o_corners[1][1])
+				c3 := grid.Get(plot.x + o_corners[2][0], plot.y + o_corners[2][1])
+				if c1.crop != region.crop && c2.crop != region.crop {
+					sides++
+				} else if c1.crop == region.crop && c2.crop == region.crop && c3.crop != region.crop {
+					sides++
+				}
+		}
+	}
+	return sides
+}

2024/go/day12/day12_test.go

@@ -0,0 +1,29 @@
+package day12
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1(`RRRRIICCFF
+RRRRIICCCF
+VVRRRCCFFF
+VVRCCCJFFF
+VVVVCJJCFE
+VVIVCCJJEE
+VVIIICJJEE
+MIIIIIJJEE
+MIIISIJEEE
+MMMISSJEEE`)
+	require.Equal(t, 1930, r)
+}
+
+func TestPart2(t *testing.T) {
+	r := Part2(`AAAA
+BBCD
+BBCC
+EEEC`)
+	require.Equal(t, 80, r)
+}

2024/go/day12/input.txt

@@ -0,0 +1,140 @@
+UUUUUUUUUUUUUUUUUUUDQQQQQQQOOOOOHHSSSSSYYYYYYYYGGGGNNNNNNNNTTTTTTTTTTTTTTDDDDDDDDDDDDDDDDDDNNNCCNJJJJOOHHHDDDDDDDDDDDDDDDDDDXXMBBBBMMCCCCCCC
+UUUKUUUUUUUUUUUUUDDDDDDDQQQOOOOOOOOOSSSSSYYYYYYYYGGGGGNNNNTTTTTTTTTTTTTTTTTTTTDDDDDDIIDDDNNNNNCCNJJJOOOHDDDDDDDDDDXDDDDDDDMMMXMMMMMMMMCCCCCC
+UUUKKUUUUUUWUUUUUUDDDDDDDDDROOOOOOOWWSSSSYYYYYYYGGGGGGGQNTTTTTTTTTTTTTTTTTTTTTDDDDDDDIDIINNNNLNNNNOOOOODDDDDDDDDDXXDDDDDDDMMMMMMMMMMMMCCCCCC
+UUKKUUKKXUUUUUUUUDDDDDDDDDDDDOOOOOOOOYSSSSSYYYYYGGGGGGQQNNTTTTTTTTTTTTTTTTTTTTDDDDDIDIIIINNNNNNNNNNOOOODDDDDDDXDDXXDDDDDDDMMMMMMMMMMMMMMCCCC
+UUKKUKKKXXUQQQQUUDDDDDDDDDDDDOOOOOOOOYYYYYYYYYYYGGGGGQQIINTTTTITTTTTTTTTTTTTTTTDDDIIIIIIIINNNNNNNNNOOODDDDDDDDXXXXXXDDDDDMMMMMMMMMMMMFFFFCCC
+UKKKKKKKXKAWWWWWDDDDDDDDDDDDDOOOOUUOYYYYYYYYYYYYGGGGQQQQIIDITIIIITTTTTTTTTTTTTDDDDIIIIIIINNNNNNNNLLLLODDDDDDXXXXXXXXDXDDDMMMMMMMMMMMMFFFFCCC
+KKKKKKKKKKKWWWWKDPPDDDDDDDWWWOOOOOUUYYYYYYYYYYYYYGRQQQQQIIIIIIIIITTTTTTTTTTTDDDDDDIIIIIIIIINNNNNNNLLLLLDDDDDXXXXXXXXXXDDDDDMMMMMMMMMMFFFCCCC
+KKKKKKKKKKWWWWWWDDDDDDDDDSWWWOWOOOOUYYAYYYYYYYYYYYQQQQQIIIIIIIIOIITTTTTTTTTTDDDDIIIIIIIIIIINNNNNLNNNLLLDDDDDDXXXXIXYDDDDDDDMMMMMMMMMMFFFCFCC
+KKKKKKKKWWWWWWWWSSDSDDDDDSSWWWWOOOOUYYAYYYYYYYYYYQQQQQQIIIIIIIIIITTTTTTTTTTDDDIIIIIIIIIIIINNNNNNLLLLLLLDDDDDDXXXXIXYDDDQDDDMMMMMMMUMFFFFFFFC
+KKKKKKKWWWWWWWWWSSSSDSDSSSSWWWWWOOOUYYYYYYYYYYYYYYQQQQIIIIIIIIIIIIIXXXXXTTTTDIIIIIIIIIIIKINNLNNNLLLLZLLLLDDVDXXXXXYYDDQQDDTMMYYYMMUUUFFFFFCC
+KKKKKKKKWWWWWWWWWWSSSSSSSSSSWWWWWWOUYPPPPPYYYYYYQQPQQQQAIIIIIIIIISSXXXXXXXTTDIIIIIIIIIIIIIIILLLLLLLLZZLLLDDDXXXXXXXYYDXXXYMMMYYYYMPUUFFFFFFC
+KKKKKKKKWWWWWWWWWWBBBBSSSSSWWWWWWWSSPPPPWWWWWWAYPPPPQAAAAITTIIIIIXXXXXXXUTTXXXIIIIIIIIIIIIIOLLLLLLLLZZLLLLLLLLXXXXYYXXXXXXXXRPPPPPPPPPFFCCFC
+KKKKKKDWWWWWWWWWWWDDBBBSSSSWWWWWWWWSSPPPPWWWWWWWPPPPPAAAAIIIIIIIIXXXXXXXXXDXXIIIIIIIIIIIIIIOLLLLLLLZZZZZZLLLLNXNNXNYYYXXXXXXPPPPPPPPPPFFCCCC
+KKKKKKWWWWWWWWWWWWBBBBBBBSSSWWWWWWWSSSSPPWWWWWWWPPPPPAAAAAAIIIIIIIXXUUUUUUXXXXIIIIIIIIIIIIIILLLLLLLZZZZZZZLLLNNNNNNYYYXXXXXXPPPPPPPPPPCFCCCC
+KTKQQKWWWWWWWWWWBWBBBBBBBSBSWWWWWSSSSSPPPWWWWWWWWPPPPPPAAFAIIYYYUUUUUUUUUUUXXXQQQIIIXXXXXXXXXXLLLLLZZZZZZZZZLNNNNNNYYXXXXXXXPPPPPPPPPPCCCCCC
+QQKAQQWWWWWWWWWWBWBBBBBBBBBSWWWSSSSSSSSPPWWWWWWWPPPPPPPPPPYYYYYYUUUUUUUUUUUQXQQQQQQIXXXXXXXXXXLZLLEZZZZZZZZZLNNPNNNYYXXXXXPXPPPPPPPPPPPCCCCC
+QQQQQQQWWWWWWWWWBBBBBBBBBBVWWWDDSSSSSSSSSPWWWPPPPPPPPPPPPPYYYYYYUUUUUUUUUUUUUUUUQQIIXXXXXXXXXXLZZZZZZZZZZZZLLUUUUUUUUXXXXXPPPPPPPPPPPPCCCCCC
+QQQQQQQQWWWWWWWWBBBBMMMBBBMWWWDSSSSSSSSSSPPPPPPPPPPPPPPPYYYYYYYBYYXXXXXUUUUUUUUUOIIIIZZZZZLLLZZZZZZZZZZZZZZZZIIIIUUUUUXPPXPPPPPPPPPPYYCCCCCC
+QQQQQQQQQWWZZZWMMMMMMMMMBMMWWDDSSSSSSSSSSSPPPPPPPPPPPPPPYYYYYYYYYXXXXXXUUUUUUUUUOOIIIZZZZLLLLLZZZZZFFFFFFFFFHHHIUUUUUPPPPPPPYPPYPPPYYYCCCCCC
+QQQQQQLQQQWWZZZMMMMMMMMMMMHHWSSSSSSSSSSSPPPPPPPPPPPPPPYYYYYYYYYYXXXXXXXUUUUUUUUUOIIIIIZLLLLLLZZZZZZFFFFFFFFFHHHIUMUUUPPPPPPPYYYYYYYYYYYCCCYC
+QQQQQLLQLLZZZZMMMMMMMMMMMMMMWSSSSSSSSSSSPPPPPPPPPBYPPPYYYYYYYYYYYYXXXXXUUUUUUUUUIIIIIIIILLZZZZZZZZZFFFFFFFFFHHFFFFQUULLPPPPPQYYYYYRYYYYYYYYY
+QQQLLLLLLLLZZZMMMMMMMMMMMMMMNMSSSSSSSSSSVVPPPPPPBBYYYYYYYYYYYYYYYYYXXXXUUUUUUUUUOIIIIILLLLZZZZZZZZZFFFFFFFFFFFFFFFFUUMMPPPPPYYYYYYYYYYYYYYAA
+QQQLLLLLLLLZZZZMMMMMMMMMMMMMMMSSSSSSSSSSVVPPPBBBBBBYYYGGGGGGGGGYYYYYYYYUUUUUUUUUIIIIILLLLZZZZZZZZZZFFFFFFFFFFFFFFFFMMMOPPPPGYYYYYYYYYYYYYYYA
+QQLLLLLLLLZZZZMMMMMMMMMMMMMMMSSSSSSSSRRSVVVVVVBBBBBYYYGGGGGGGGGYYYYYYYXUUUUUUUUUIIIIILLLLLZZZZZZZZZZZHHZZHHFFFFFFFFMMMMMPPPYYYYYYYYYYYYYYYYY
+QQLLLLLLLLLZZZMMMMMMMMMMMMMMMSSSSSSRRRRSVVVVVBBBBBBBYYGGGGGGGGGYYYYYYEEUUUUUUUUUIIIIILLLLLBZZZZZZZZZZHHHHHHFFFFFFFFMMMMMMPIIYYYYYYYYYYYYYYYY
+QQQLLLLLLZZZZZZMMMMMMMMMMMMMFSSSSSSRRRRRRVVVVVVVVBBYGGGGGGGGGGGYYXYYYEEEEEEEEEEEIEIILLLLLLZZZZZZZZZZZZHHHHHFFFFFFFFMMMMMMPPIIYYYYYYYYYUUYYYU
+QQQQQQGLLLLPPPMMMMMMMMMMMMMMMSRSSSRRRRRRVVVVVVVVBBBQGGGGGGGGGGGGGGYXXXEEEEEEEEEEEEELLLLLHZZZZZZZZZZZXZHHHHHFFFFFFFFMMMMIIIIIYYYYYYYYYYUUUUYU
+QQQQQQQQQLKPPPPIIMMMMMMMMMUUUURRSRRRURRRVVVVVVVVVBQQGGGGGGGGGGGGGGXXXXXEEEEEEEEEJEELLLHHHHHHHHHZZDDZZZHHHHHFFFFFFFFQMMMQQIIIIYUUUUYYYYUUUUUU
+JJQQQTQQQKKKPPPPPQQMUUMUUUUUURRRSRUUURRRUUUVVVUVVVQQGGGGGGGGGGGGGGXXXXXEEEEEEEEEJJJLLHHTTHHHHHHYYYDDDZHHHHHFFFFFFFFQMMMQQQQQUUUUUUUUUUUUUUUU
+JJJJQTTQKKKPPPPPPQQQUUUUUUUCURRRRRRUUURRUUUVUUUUVVQQGGGGGGGGGGGGGGXXXXZEEEEEEEEEJJJJJHTTTTHHHHHHYDDDDHHHHHHMMQQQHQQQQMQQQQQUUUUUUUUUUUUUUUUU
+JJJJJTTTPKKPPPPPPPQUUUUUUUUUUURRRRRRUUUUUUUVUUUUUVVQGGGGGGGGGGGGGGXXXXZEZZZZEEEJJJJJTTTTTTTTHHHHYYYMMHHHMHHMMMQQQQQQQQQQQQQUUUUUUUUUUUVUUUUU
+JJJJJTTPPPPPPPPPPPPUUUUUUUUUURRRRRRUUUUUUUUUUUUUUVVUGGGGGGGGGGGGGGXXRRZZZZZZEEDDDJJTTTTTTTTHHHHHYMMMMHMHMMMMMMMQLLLQLQQQQQQUUUUUUUUUVUVVUUUU
+JJJJJJJPPPPPPPPPPPUUUUUUUUUUURRRRPRRRUUUUUUUUUUUUVVUGGGGGGGGGGGGGGZRRRRRRRDDDDDDDJJJZTTTTTTTHHYYYYMMMMMHHMMMMMLLLLLLLLQQSQQSSUUUUBBBVVVVVUUU
+JJJJJBBPPPPPPPPPPPUUUUUUUUUUUURRRPPCCUUUUUUUUUUUUUUUGGGGGGGGGGGGZZRRRRRRRBDDDDDDDJJJTTTTTTTTYHYYYYYYUMMMHMMMMLLLLLLLLLLLSSSSUUUUBVVVVVVZVUUU
+JJJJBBBBPPPPPPPPPPUUUUUUUUUUUURRPPPCCGUUUUUUUUUUUUUUUGGGGGGGGGGGZZZRRRRRRRYDDDDDDJJTTTTTTTTTYYYYYYYYYMMMMMMMMMMMLLLLLLLSSSSSSUUUBVVVVVVVVVUU
+JJJJBBBBPPPPPPPPPPUUUUUUUUUUUURUPPPCCCCCCUUUUUUUUUUUUGGGGGGGGGGGZZZRRRRRRRRRRRRDDDJTTTTTTTTYYYYYYYYYMMMMMMMMMMMLLLLLLLLSSSSSSSSSEEEEVVVVVVVU
+JJJJBBBBQQQPPPPPPPUUUUUUUUUUUUUUPPCCCCCCCUUUUUUUUUUUUGGGGGGGGGGGZZZRRRRRRRRRRRRDDDTTTTTTTTTTYYYYYYYOYMMMMMMMMMMMMMLLLLLLSSSSSSEEUEEEVEEVQQVQ
+JJJJJBBBBQQQPPPPUUUUUUUUUUUUUUPPPPCCCCCCCCCFFUUUUUUUQGGGGGGEEKKKKZZRRRRRRRRRDDDDHDTTTTTTTTTTTTYYYYYYYMMMMMMMMMMMMMMMSSSSSSSSSSEEEEEEEEQQQQQQ
+JJJJBBBBBQQQQQPPUHHWUUUUUUUUUUPPPPCCCCCCCCCFFUUEUUMUQGGGGGGEEEKKKZRRRRRRRRRRRHDDHDDDTTBTTTTTTTYYYYYYYYMMMMMMMMMMMMSSSSSSSSSSSEEEEEEEEEEQQQQQ
+JJHBBBBBQQQQQPPPPHHWWUUUUUUUUPPPPPCCCCCCCCCCAUUEUUUUQGGGGGGEKKKKPRRRRRRRRRRRRHHHHHDTTTTTNTTTTTTTXYYAAYYMMMMMMMMMMMGGSGGGOOOSOOOEEEEEEEEEQQQQ
+JHHHBBBBQQQQQPPPPHHWWUUUWWWUPPPPPPPPCCCCCCAAAAAEEEUUUGGGGGGCKKKKKKKRRRRRRRRRRHHHHHDTWWTTNNNTTTXXXYAAAAMMMMMMMMMMMGGGGGGJOOOOOOEEEEEEEEEEQQQE
+HHHHBBBUQQQQQPPPPWHWWWUWWWWUPPPPPPPPPPCCCCAAAAAEEEEEEGGGGGGCKKKKKKKRRRRRRRRRGGHHHHHHWWNNNNNNTXXXXXXAAAAAMMMMMMMMGGGGGGJJOOOOOOEEEEEEEEEEEQEE
+HHHHHBBBBQQQPPPPWWWWWWWWWWWWWPPPPPPPPPCCCAAAAAEEEEEECCCCCCCCKKKUKKRRRRRRRRRRRGHHHHHWWDDDNNNNTTXNNNNVAAAAAMWMMMMMGGGGGGJJOOOODEEEEEEEEEEEEEEE
+HHHHHHHHUQQUPPPPWWBWWWWWWWWWWPPPPPPPPPCCAAAAAAAEEEEECCCCCCCCCKKKKRRRRRRRREKKKKKDHHHWDDDDNNNNNNNNNNNNNAAAAAMMMMPMMEGGGEOOOOOOEEEEEEEEEEEEEEEE
+HHHHUHHHUQQUUPPPSUUWWWWWWWWWWPPPPPPPPPPCJPBAATTTTTEEEERRCCCCRRKKKKRRRRRRRRKKKKKKNHHWDDDDDNNNNNNNNFFNNAAAAAAAAMPMEEGGGEOOOOOOVVVEEEEEEEEEEEEE
+HHHHUUUUUUUUUUVVUUWWWWWWWWWWWPPPPPPPPPPPPPAATTTTTTEEEERRUCCCCRKKKKKKRRRKKKKKKDDJDDDWDDDDDNNNNNNNNNNNAAAAAAAAAMMAEEEGGEEOOOOOOVVSESSSSEEEEEEE
+HHHHHUUUUUUUUUUUUUWWWWWWWWWWWPPPPPLTTPPPPPPTTTTTTTTTEERRRCCCCRRKKKKKRRKKKKKKKDDDDDDDDDDDDDDNNNNNNNNNAAAAAAAAMMAAEEEEGEEEEEOOVVSSSSSSSEEEEEEE
+HHHHHHHHHUUUUUUUUUWWWWWWWWWWLLLLLLLTTPPPPPPTTTTTTTTTEERRPCERRRRRKKKKKKKKKKKMKLDDDEDDDBBBBBBBNNNNNNNNNAAAAAAAAAAAAAEEEEEEEEOOVVSSSSSSSSSSEGGE
+HHHHHHHUUUUUUUUUXUWWWWWWWWWWLLLLLLLTTTPPPTTTTTTTTTTTERRRRRRRRRRRRKKKKKKKKMKMLLLDDDDDDBBBBBBBNNNNNNANAAAAAAAAAAAAAAEEEEEEEEEESSFSSSSSSSSSESGG
+HHHHHHHUUUUUUUUXXXXWWWWWWLLLLLLLLLTTTTTTTTQTTTTTTTTTTRRRRRRRRRRRKKMMKKKKKMMMMMLLDDDDDBBBBBBBNNNNNNNAAAAAAAAAAAAAAAKKEEEEEEEESSSSSSSSSSSSSSGG
+HHHHHUUUUUUUUUUXXXXXWWWXLLLLLLLLLLTTTTTQQQQTTTTTTTTTTTRRRRRRRRRRRKMMMKKKKMMMMMMDDDDDDBBBBBBBNNNNNNNNNAAAAAAAAAKKKKKKEEEEEEEEESSSSSSSSSQSNQGG
+HHHKKUUUUKUUUWWXXXXXXXXXLLLLLLLLLLQQQTTQQHQTQQQTTTTTTRRRRRRRRRRRRMMMMKKKKMMMMMMDDDDDDBBBBBBBDNNNNNNNBBBBBBBAAAAKKKKKKKEEEEEEEESSSSSSSSQQQQGG
+HHHHKKLKAKKUWWWXXXXXXXXXLLLLLLLLLLQQQTTQQHQQQQTTTTTTTRRRRRRRRRRRRMMMMMKMMMMMMMMQQDDDDBBBBBBBNNNNNNNNBBBBBBBAAAAKKKKKKEEEEEEEESSSSSSSSSQGQQGG
+HHHHHKKKKKKUWWWWWXXXXXXXXLLLLLLLLLQVQQQQQQQQQQQTTTTTRRRRRRRRRRRNNMMMMMMMMMMMMMMQQZDDDBBBBBBBBBBBBBNABBBBBBBAAAAKKKKKKEEEEEENEESSSSSSQSQQQQGQ
+HHHHKKKKKKKRWWWWWWXXXXXXXLLLLLLIILIQQQQQQQQQQQQQTTTTRRRRRRRRRRRNMMMMMMMMMMMMMMMQQZDDDBBBBBBBBBBBBBBBBBBBBBBAAAAKKKKKKEEEENNNNSSSSSSSQQQQQQQQ
+HMHHKKKKKKKRWWWWWXXXXXXXXLLLLLLIIIIQQQQQQQQQQQQQTTTRRRGRRRRRRRRNMMMMMMMMMMMMMMZQZZDDDBBBBBBBBBBBBBBBBBBBBBBAAAAAAKKKKEEENNNNNSSSNSSSQQQQQQQQ
+MMKKKKKKKKKWWWWWWXXXXXXXXLLLLLLLLIIIQQQQQQQQQQQQQQTRRRRKKRRRRRNNMMMMMMMMMMMMBBZZZZZZDBBBBBBBBBBBBBBBBBBBBBBAAIIAKKKKKKKENNNNNNNSNSSUUQQQQQQQ
+NMMMMKKKKKKWWWWWWWXXXXXLLLLLLLLLLLLIIQQQQQQQQQQQQEEERRIIKRRRRNNNMMMMMMMMMMMMMBZZZZZZZBBBBBBBBBBBBBBBBBBBBBBNIIIKKKKKKKKKKNNNNNNNNSUUQVQQQQQQ
+MMMKKKKKKKKWWWWWWXXXXXXXXRRRRJXXXLIIQQAQQQQQQQQQQEEEEEIIIIINNNNNNMMMMMMMMMMMBBZZZZZZZDSSBBBBBBBBBBBBBBBNNNEEIIIKKKKKIKKNNNNNNNNNNNQQQQQQQQQQ
+MFMIFFKKKKKKWWWWWWXXXXXXRRRRJJJXXQQQQQQQQQQQQQQQQEEEEEEEIINNNNNNNNNNMMMMMMMBBBBBZZZZZDZZBBBBBBBBBBBBBBBNNNIIIIIKKKIKIINNNNNNNNNNNQQQQQQQQQQQ
+FFBIFFFKKKKKWWWWWWXXXXXXWWRRRJJXXXXQQQQQQQQQQQQQQEEEEEIIIINNNNNNNNNNNMMMMMMMBBBCBZZZZZZZBBBBBBBBBBBNNNNNNIIIIIIIIIIIIINNNNNNNNNNNNNQQQQQQQQQ
+FFBBBFFFFKKKYWWWXXXXXXVWWWRRRJXXXXXXXQQQQIQQQUQQUUEUEEIIIIIIINNINNNNMMMMMBBBBBBBBBZZZZZZZZBBBBBBBBBIINNNNIIIIIIIIIIIIIIINNNNNNNNNNNNNHQQQQQQ
+FBBBBFFFFFFFFWWWXXXXXXXWWWRWWXXXXXXDDPPPQQUUUUUQUUUUIIIIIIIIIIIINNNNMMMMMBBBBBBBBBZZZZZZZZBBBBBBBBBINNNNNIIIEIIIIIIIIIIIINNNNNWNNNNNNHQZQQQQ
+BBBBBFFFFFFFEEEQXXXXXXXXWWWWWXWXXXXDDPPZZUUUUUUUUUUUIIIIIIIIIIIINNNNNNMBBBBBBBBBBBBZZZZZZZBBBBBBBBBIIIIEEEEEEIIIIIIIIIIIWWWWWUWWNWNNNNQZZDDD
+BBBBBFFFFFEEEEEQXNNXXXWWWWWWWWWWXDDDDQQUUUUUUUUUUUHBIIIIIIIIIIIBNNNNNNBBBBBBBBBBBBZZZZZZZZBBBBBBBBBIIIIIEEEEEIIIIIIIIIIIWWWWUWWWWWNNNNNZDDDD
+BBBBBBFFFFFEEEEEENNNNWWWWWXXXXXXXXXXDDDDDDDUUUUUUBBBIIIIIIIIIIIBNNNNNBBBBBBBBBBBBDBBZZZZZZBBBBBBBBBIIIIEEEEEEEEEIIIIIIIWWWWWWWWWWWNNNZZZDDDD
+BBBBBBBEFFFEEEEEENENNNWWWWXXXXXXXXXXDDDDDDDDUUUUBBBBBIIIIIIIILBBBNBNNNNBBBBBBBBBBBBZZZZZZZBBBBBIIIIIIEEEEEEEEEEEIIIIIIIWWWWWWWWWWWZZZZZZDDDD
+BBBBBBEEEYEEEEEELEEENNWWWWXXXXXXXXXXDDDDDDUUUUUUUBBBBIIIIIIIIIBBBBBBBBBBBBBBBBBBBBBBZZZZZZHHHUUUIIIIIENEEEEEEEEEIIIIMMMWWWWWWWWWWWZZZZZZZZDD
+BBBBBBBEEEEEEEEEEEEENWWWWWXXXXXXXXXXDDDDDDDUUUUUUBBBBIIIIIEIIBBBBBBBTTBBBBBBBBBBBBBZZZZZZZHUUUUUUUIIEEEEEEEEEEEEEMMMMMMMWWWWXXXXXWZZIJZZZZDZ
+BBBBBBBBBEEEEEEEEEEEELXXXXXXXXXXXXXXDDDDDDUUUUUUUBTUBIIIIIIIBBBBBBBBTBBBBBBBBBBBBBZZZZZZZZUUUUUUUUIIIELEEEEEEEEEEMMMLWWMWXXXXXXXXXZIIIIIZZDZ
+BBBBBBBBBEEEEEEEEEEEEEXXXXXXXXXXXXXXDRRDZAUUUUUUUUUUUNNNNIMBBBBBBBBBBBBBBBBBBBBOOBZZZZZZZZZUUUUUUUUUEEEEEEEEEEEEEMMMLLWWWXXXXXXXXXZIIPIZZZZZ
+BBBBBBBBBBEEEEEEEEEEEWXXXXXXXXXXXXXXDRRDAAAUUUUUUUUMMMNMNNMBBBBBBBBBBBRNBBBBBVNOZZZZZZZZUUUUUUUUUUUUUEEEEEEEELELLMMLLLWWWXXXXXXXXXZIIIIIIZZZ
+BBBBBBLLLLLLEEEEEEEEEEXXXXXXXXXXXXXXWVVAAARAUUUUUUUMMMMMMMMBBBBBBBBBBBRNNBBNNNNOOZZZNNZUUUUUUUUUUUUUUUUEEEEEELLLLMLLLLWWWXXXXXXXXXZIIIIIIZZZ
+BBBBBBLLLLLLEEEEEEEEEEXXXXXXXXXXXXXXWVVAAAAAAUUUUUUMMMMMMMMBBBBBBBBBBRRNNNNNNNNOONZZNNZUUUUUUUUUUUUUZEEEEEEEELLLLLLLLVWWWXXXXXXXXXIIIIIIIIIZ
+BBBBBBLLLLLLLLXXEEEVEKXXXXXXXXXXXXXXWVVVVVVAAAAUUUUMMMMMMMMBBMBBBBBBBBRNNNNNNNNNNNNNNUUUUUUUUUUUUUUUEEEEEEEEELLLLLLLLLLLWXXXXXXXXXIIIJZZZZZZ
+BBBBBBLLLLLLLGLLEEEEEKXXXXXZZZZZZZWWVVVVVVVVVUUUUUMMMMMMMMMMMMBBBBBBBBNNNNNNNNNNINNNNUUUUUUUUUUUUUUJEEEEEEEELLLLLLLLLLLWWXXXXXXXXXJJJJJJJZZZ
+BBBBBBLLLLLLLLLLLLLLLLXXXXXXXXXXXXXWVVVVVVVVVUUUUUMMMMMMMMMMMMBBBBBBBBBNNNNNNNNNNNNNNUUUUUUUUUUUUVVICCELEEEELLLLLLLLLLDDWXXXXXXXXXWWJJJJZZZZ
+BLLLLLLLOOOLLLLLLLLLLLXXXXXXXXXXXXXWVVVVVVVVVVURRUFRMMMMMMMMMBBBBBBBBNNNNNNVKKNNNNNNNNNNNUUUUIVVVVVICCCEEEEELLLLLLLLLDDDDXXXXXXXXXJJJJJJJZZZ
+BLLLLLLLOOOLLLLLLLLLLLCZZZXXXXXXXXXZVVVVVVVVVVRRRRRRRRMMMMMMMIIIBBBBBBBBVVVVVKYNNNNNNNNNNNUIIIIVVVIIIIEEEEELLLLLLLLLLDDDDDDXXXJJJJJJJJJJJZZZ
+BLLLLLLLOOOLLLLLLLLLLLLLZZXXXXXXXXXZVVVVVVVVVRRRRRRRRRRRTTTIIIIIIIBBBYYVFVVVVVYYNNNNNNNINNNIIIIVVIIIIEEEEEEEELVLLLLGLLDDDDDXXXJJJJJJJJJJJJJZ
+LLLLLLLLOOOLLLLLLLLLLLLNZZXXXXXXXXXZVVVVVVVVRRRRRRRRRRRRRRRNIIIIIBBBBYYVVVVVYYYYYYNNNNNIIIBIIIIVIIIIIBEEEDDKELVVDLLLLDDDDDDDDDJJJJJJJJJJJJJZ
+LLLLLLLLOOOLLLLLLLLLLALNZZXXXXXXXXXZVVVVVVVVKRRRRRRRRRRRRRRRRIIIIBBBBBYYYYVVYYYYYYNNNIIDIIIIIIIIIIIIIIDREDVDEVVVDLLDLDDDDDDDDJJJJJJJJJJJJJJJ
+LLLLLLLLOOOLLLLBBBLLAAZZZZZZZZZZZZZMVVVVVVVRRRRRRRRRRRRRRXRRIIIIIIIIBYYYYYVVYYYYYYNNNIIIIIIIIIIIIIIIIIDDDDDDDVVDDDDDDDDDDDQDDDJJJJJJJJJJTJJC
+LLLLLLLLOOOLLLBBBBLLLAAAAAMZZZZMZZMMMVVVVVVRCCCRRRRRRRRRRRRRIIIIIKKYYYYYYYYYYYYYYYYYNNIIIIIIIIIIIIIIIIDDDDDDDVDDDDDDDDDDDQQDDDJJJJJJJJJTTTJC
+LLLLLLLLOOOLLLLBBBLQLAAAAAMMMZZMZMMMVVVVVVVRCCCCCRRRRRRIIIRRRIIIIKKYYYYYYYYYYYYYYYYYYIIIIIIIIIIIIIIISIDDDDDDDVVDDDDDDDDDQQQDQQGJJJJJJJJGGGCC
+LLLLLLLLOOOLLLBBBBBBAAAAAAMMMMMMMMMMMVVVVVVCCCCCCRRRRRRIIIIIIIIIIIKYYYYYYYYYYYYYYYOOOIIIIIIIIIIIIIIIGIDDDDDDDDDDDDWWQQQQQQQQQQGJTJJWWWWGGGCC
+LLLLLLLLOOOLLLBBBBBBAAAAAAAMMMMMMMMMXXVVVVVCCCCCCCEEERJJJIIIIIIIIKKKKYYYYYYYYYYIIIIIIIIIIIIIIIIIIIIGGGDDDDDDDDDDIWWGQQQQQQQQTTJJTTGGGGWGGGGC
+TLLLLLLLLLLLLLBBBBBBBAAAAAAMMMMMMMMXXXVVXVVCCCCCCCEEEEAAAAAIIIIIIKKKKYYYYYYYYYYIIIIIIIGIIIIIIIIIIFGGGGDDDDDDDSDWWWGGQQQQQQQQTTTTTGGGGGGGGCCC
+TLLLLLLLLLLLLLCBBBBBBBACAAAMMMMMMMMXXXXXXXCCCCCCCCEEECAUUUUUUIIIIKKKYYYYYYYYYIIIIIIIIIGIIIIIIFFFFFGGGGDDDDDDSSSSWWWGGQQQQQQQTTTTGGGGGGGGGCCC
+ZLLLLLLEELLLLLBBBBBBBUCCCMMMMMMMMMMMXXXXXCCCCIIIIIIIIIIUUUUUUHIIKKKKYYYYYYYYYYGXIIIIIIGIIIIIIGGFFFGGGGGDDDDDSSSSSGGGGGQQQQQTTTTGGGGGGGGCCCCC
+ZZLLLZZLLLLLLLBBBSBBBBBCMMMMMMMMMMXXXXXXXXCCCIIIIIIIIIIUUUUUUHIIIIKKJYYYYYYYYGGGIIIIIGGGGIIIQGGFGGGGGGGSSSSSSSSSSSSGGQQQQQTTQTTTTGGGGGGCCCCC
+ZZZEZZZZZLLRLLCCKCBBCCCCMMMMMMMMMMMXXXXXXXCCCIIIIIIIIIIUUUUUUHHHIIKKJYYYGGAGGGGGGFGIWGGGGIIGGGGGSSSSSSSSSSSSSSSSSSGGGQQQQQQQQQTTGGGGGGGCCCCC
+ZZZZZZZZZZLLLLSCCCCCCCCCCMNNMMMMMEEXXXXXXXXCCIIIIIIIIIIUUUUUUHQHHHJJJJJYGGGGGGGGGFGGGGGGGGGGGGGGSSSSSSSSSSSSSSSSSWWWGWQQQQQQQQQTGGGGGGCCCCCC
+ZZZZZZZZSSLLLSSSCCCCCCCCMMNMMMMMMMMXXXXXXCCCTIIIIIIIIIIUUUUUUHQHHJJJJJJGGGGGGGGGGGGGGGGGGGGGGGGGSSSSSSSSSSSSSWWWWWWWWWQWQQQQWQTTGGGGGGGGCCCC
+ZZZZZZZZSSSSSSSSSCCCCCMMMMMMMMMMMMMXXXXXXCXXCIIIIIIIIIIQQQQQQQQQAJJJJJJJJJGGGGGGGGGGGGGGGGGGGGGGGGGGGGGSSSSSSSSWWWWWWWWWWQWWWQQGGGGGGGGGCCCC
+ZZZZZZZSSSSSSSSSSCCCCCMMMMMMMMMMMMMXXXXXXXXXXIIIIIIIIIIIIQQQQQQAAEAJJJJJJJGGGGGGGGGGGGGGGGGGGGGGGGGGDDDSSSSSSSSWWWWWWWWWWWWQQQQQGOGGGGGGCCQC
+ZZZZZZZZSTTTSSSSSCCCCCCCMMMMMMMMMMXXXXXXXXXXXXXWWIIIWAIIIQQAPQQAAAAAJJJJGGGGGGMGGGGGGGGGGGGGGGGGGGGGDDDDSSSSSSSAWHWHWWWWWWWQQQQQGGGQQGGGGCQQ
+ZZZZZZZZZTTTSSSTSSCCHCCMMMMMMEMMMAXXXXXXXXXXXXWWWIIIIIIIIIAAPPPAAAAAJJJMGGGGGGMMMGGGGGGGGGBBGGGEGGGGDDBDSSSSSSSHHHHHWWWWYWWQQQQQQQQQQQQGQQQQ
+ZZZZZZZOZTTTTTTTTSCCHCHMMMEEEEEMAAXXXXXXXXXXXXWIIIIIIIIIIIAUAPAAAAAAJJJMGGGMMGMMMGGGGGGGGGGGGGEEGGGGSSSSSSSSSSSHHHHHWWWYYQQQQQQQQQQQQQQQQQQX
+ZZZZZZZOZZTTTTTTTTTHHHHHMEEEEEEEEAAXXGXJXXXXXXWIIIIIIIIIIIAAAAAAAAAAAMMMMMMMMMMMGGGGGGGGGGGGGWEEEEEESSSSSSSSSSSHHHHHHHWHHHHQQQQQQQQQQQQQQQQQ
+ZZZZZOOOTTTTTTTTTTTTTTEHEEEEEEEEAAXXXXXJXCXXXIIIIIIIIIIIIIAAAAAAAAAAMMMMMMMMMMMMGGGGGGGGGGGGGWEEEEEESSSSSSSSSSSHHHHHHHHHHHHQQQQQQQQQQQQQQQQQ
+ZZZZZOOOTTTTTTTTTTTTTTEEEEEEEEEEEAXXAAAJACCCCIIIIIIIIIIIIIAAAAAAAAAAAAMMMMMMMMMMMMMGGGGGGGGGGEEEEEEESSSSSSSSSSSHHHHHHHHHHHHQKKQQQQQQQQQQQQQQ
+OOOOOOOOOOTTTTTTTTTTTUUESSSSSSSEAAAAAAAAACCCCIIIIIIIIIIIIIFAAAAAAAAAAAMMMMMMMMMMMGGGGGGUGGGEGEEEEEEESSSSSSSSHHHHHHHHHHHHHHHHKKKKQQQQQQQQQQQQ
+OOOOOOOOOOTTTTTTTTTTUUUESSSSSSSEAAAAAAAAACCCCIIIIIIIIIIIIIAAAAAAAAAAAMMMMMMMMMMMMMGGGGGGGEEEEEEEEEEESSSSSSSSXXHHHHHHHHHHHHHHKKKQQQQQQQQHQQQQ
+OOOOOOOOOOOTTTTTTTTTCCCESSSSSSSZEAAAAAAAEEECCSIIIIIIIIIISSAAAAAAAAAAMMMMMMMMMMMMMMGGGGOOEEEEEEEEEEEESSSSSSSSXXXHHHHHHHHHQHHHHKNPPIQQQQQHQHHH
+OOOOOOOOOOTTTTTTTTTTCCCCSSSSSSSEEEAAAACEEEESSSIIIIIIIIIISSAAAMMAAAAAMMMMMMMMMMMMMMXXGGJEEEEEEEEEEEXBSSSSSSSSXXXXHHHHHHHQQHHKKKNNPIIIQIIHHHHH
+OOOYYYYYOOTTTTTTTTTTBCCCSSSSSSSEHHHAAAEEEEESSSIIIIIIIIIITGGAMMMAAAMMMMMMMMMMMMVVVMXXXJJJJEEEEEEEEEXXSSSSSSSSXXXXXHHHHHHHHHKKKKKNNIIIIIIHHHHH
+OOYYYYYYOTTTTTTTTTUTCCCCSSSSSSSEHHHAAAEEEEEESSIIIIIIIIIITGGAMMMAAAAAMDMMMMMMMMVVXXXXXJJJJEEEEERRREXXSSSSSSSSXXXXXHHTHTKKHHKKKKKNNTIIIIIHHHHH
+OOYYYYYYOYTTTTTTTCUCCCCCSSSSSSSYYHIIIIIEEEEESSIIIIIIIIIITTTTMMMMAAADDDDMMMMMMMVVVVXXXJJJJJEEEERRRXXXBBBXXXXXXXXXHHHTTTTKKKKKKKNNNTIIIIIIHHHH
+YYYYYYYYYYTTTTTTTCCCCCCCSSSSSSSYYHIIIIIIEEEEESSSSSSSSSTTTTTJTYYYAADDDDDDVVMVVVVVVVJJJJJJJJEEEEERRXXXBBXXXXXXXXXXGGGTTTTTKKKNNNNNIIIIIIIIIHHH
+YYYYYYYYYYYYTTTYYYCCCCCCSSSSSSSSSPIIIIIEEEEEESSSSSSSTSTTTTTTTTYYYADDDDDDVVVVVVVVVVJJJJJJJJEEEERRRXXXXXXXXXXXVXVVVVGTTTUTKNNNNNNNIIIIIIIIIHHH
+YYYYYYYYIIYYYYYYYCCCCCCCCCSSSSSSSIIIIIIIEEEEEEESSSSSTTTTTTTTTTTYYYDDDDDDVVVVVVVVVVVVVJJJJJEEERRRRRRXXXXXXXXXVVVVVGGTTTTMNNNNNNNNIIIIIIIIIHHH
+YYYYYYYYHHHHHHYYYYCCCCCCCCSSSSSSSIIIIIIEEEEESESSSSSSTJTTTTTTTTYYYYYDDDDDDVVVVVVVVVVJJJJJJJEEERRRRRRRRXXXXXXXVVVVVVVVATTNNNNNNNNNIIIIIIIIHHHH
+YYYYYYYYYHHHHHHYYYCCCCCCCCSSSSSSSIIIIIGEEEEESSSSSSSSSYTTYTYYYYYYYYYDDDDDDDDVVVVVVVVJVVVVJEEERRRRRRRRRXRRXXXXVVVVVVVVAAAANNNNNNNNNIIIIIIIIHHH
+YYYYYYYDYHHHHHYYYYCCCCCCCCSSSSSSSIIIGGGEEEEEESSSSSSSSYYYYYYYYYDDDYYYDDDDSDDDVVVVVVVVVVVVVEEERRRRRRRRRRRRXXXXVVVVVVVVAAAANNNNNNNNNNIIIIUUIIHH
+YYYYYYYYHHHHHYYYYYCCCCCCCCSSSSSSSIIIIIIIPEEEEESSSSSYYYYYYYYYYYDDDDSSDSSSSVVVVVVVVVVVVVVVEEEERRRRRRRRRREEXXXVVNVVVVVVAAAANNNNNNNNNNIIIUUUUUHH
+SYSSSSYYHHHHHHYYYYCCCYCHCCSSSSSSSSSSSIHPPEEEEEEESSSYYYYYYYYDDYDDDDSSSSSSSSSVVVVVVVVVVVMMMMMMKMRRRRRRRRTEXXXXTVVVVVVAAAAAANNNNNNNNNNUIUUUUUUH
+SYSSSSYYHHHHHHYYYYYYCYIHHCSSSSSSSSSSSHHHHEEEEEESSSSAYYYYYYYDDDDDDDFSSSSSSSSSVVVVSVVMMMMMMMMMKMMRRRRRRTTEETTTTTTVVVAAAAAAANNNNNNNNNNUUUUUUUUU
+SSSSSSSSSHHHHHYYYYYYYYYHHHHSSSSSSSSSSHHHHEEEEEEAASSSHYYYYYYDDDDDFFFSSSSSSSSSSVVVSVVMMMMMMMMMMMMRTRRRRTTTTTTTTTTVAAAAAAAAANNNNNNNNNNUUUUUUUMU
+SSSSSSSHHHHHHHHHYYYYYYYYHHHSSSSHHIIIHHHHEEEEEAAAAASHHHHSYYYDDDFFFFSSSSSSSSSSSSSSSVVMMMMMMMMMMMAATRRRTTTTTTTTTTUVAAAAAAAANNNNNNNNNNNUUUUUUUUF
+SSASSSSSSHHHNHHHZZJJYTYHHHHHHHHHHHIIHHHHHHEEEAAAAAAATHXXXYYADDFFFFSSRSSSSSSSSSSSVVVMMMMMMMMMMMAATTTTTTTTTTTTTTTAAAAAAAAAAUNNNNNUNUUUUUUUBBBF
+SSASSSSSSHHHHJHZZJJJYYYHHHHHHHHHHHHHHHHHHHGEEAAAAAAAAXXXXYYAAAAAAAASASSSSSSSSSSSSSVVMMMMMMMMMAATTTTTTTTTTTTTTTAAAAAAAAAAUUNNUNUUUUUUUUUBBBBB
+SAAAASSSSBHHVJHHJJJJYYHHHHHHHYYHHHHHHHHHHHGAAAAAAAAAAXXXXXYYAAAAAAAAAAASSSSSSSSSVVVMMMMMMMMMMAATTTTDTTTTTTTTTTTAAAAAAAAAUUUUUNUUUUUUUUBBBBBB
+SAAAAASBBBBJJJJHJJJJYYHHHHHHYYYYYHHHHHHHHAAAAAAAAAAAAXKXXXIRAAAAAAAAASSSSSGASSSSVVVTMMMMMMMMAAAATTMDTTTTTTTXZTTAAAAAAVAAVVUUUUUXUXUUUUUHHBBH
+AAAAAASSSBJJJJJJJJJHHHHHHHHYYYYYYYYYHHHHHAAAAAAAAAAAAXXXNIIRRAAAAAAAAAAAASSAASSSSVTTMSMMMMMMMAAATTMMMMTTTXTXXTXAAAAAAVVVVEUUUUUXXXUUUUUUHHHH
+AAAAAJRJJJJJJJJJJJJHHHHHHHYYYYYYYYYYHHHHHAAAAAAAAAAAAJIIIIIRAAAAAAAAAAAAAASAAATSRVTTMMMMMMMXXXAAATPMMMKXXXXXXXXXAAAAAVVVVUUUUUXXXXXXXUUUHHHH
+AAAAARRTTJAAJJJJJJJJHHHHHHHYYYYYYYYYHHHAAAAAAAAAAAAAAJIIIIIIIIIAAAAAAAAAAAAAATTTVVTTMMMGMZZXXXXAAMMMMXXXXXXXXXXXAAAVVVVVVUUUUXXXXXXXXXHHHHHH
+AAAAARRRJJAJJJJJJJJJHHHUUUUUYYYYYYYYYYEAAAAAAAAAAAAAAAYYIIIIIIIIAAAAAAAAAAAAAATTTTTTWMMMMZZXXXAAAAMMMXXXXXXXXXXXAAAVVVVVVUVVUXXXXXXXXXXHHHHH
+AAAAAAARJAAJJJJJJJJJMPPUUUUUYYYYYYYYYYAAAAAAAAAAAAAAAAAAIIIIIIIAAAAAAAAAAAAAAATTTTTWWDDDMXXXXXXXAAAXXXXXXXXXXXXXAAVVVVVVVVVVUXXXXXXXXHHHHHHH
+AAAAAARRRAAAJJJJJJJJPPPUUUUUYYYYYYYYYYAANNAAAAAAAAAAAIAIIIIIIIIAAISAIIIAAAATAATWWTWWWWDDXXXXXXXXXXXXXXXXXXXXXKKKAAVVVVVVVVVVUXXXXXXXXHHHHHHH
+AAAAAGGRRAAAAAJJPPPJJPPUUUUUYYYYYYYYYYYOOOOROSSAAAIAAIIIIIIIIFIIAIIIIIIAAOOOAATTWWWWWWWXXXXXXXXXXXXXXXXXXXXXXXKAAKVVVVVVVVVVVTXXXXXIIXXHHHHH
+AAAAAGGGRRRAAAAAAPPPPPPPPPYYYYYYYYYYYYOOOOOOOSSSSAGGGGGIIIIIFFIIIIIIIIAAOOOOOOTTWWWWWWWXXXXXXXXXXXXXXXXXXXXXXXKKKKKKVVVVVVVVVVXXXXXXXEXXHHHH
+AAAAAGGARAAAAAAPPPPPPPPPPPPPYYYYYYOYYYOOOOOOOSSSSGGGGGIIIIIIIFIIIIIIIIAAOOOOOOOOWWWWWWIIXHXXXXXXXXXXXXXXXXXXXXKVVVVVVVVVVVVVVVXXXXXXXEXXHHHH
+AAAAAGGAAAAAAAAPPPPPPPPPPPPPPPYYOOOOOYOOOOOOOOOSSGGGGGGIIIIIIIIIIIIIIIOOOOOOHHHHWWWWWWIIXHXXXXXXXXXLXXXXXXXXXXXZZVVVVVVVVVVVVVVXXXXXXXXXHHHH
+AAAGGGAAAAAAAAPPPPPPNNNPPPPPPPPPPOOOOOOOOOOOOOCGGGGGGGGGIIIIIIIIIIIIIIIQIOOOHHHHHWWWWWWIJHHXXXXXXXXXXXXXXXXXXHXZZVVVVVVVVVVVVVVXXXXXYYXXHHHH
+GAAGGGGAAAAAAAAAPJJNNNNPNPPPPPPPNOOOOOOOOOOOOOCGGGGGGGGGGGIIIIIIIIIIIIIIIOHHHHHHHWIWIIIIJHHXXXXXXXXXXXXXXXZZXXZZZVVVVVVVVVVVVVVYXYYYYYYYEEHH
+GGGGGGGGAAAAAAAAAJJNNNNNNPPPPPPPPOOOOOOOOOOUOOOGGGGGGGGGGINIIIIIIIIIIIIIIIIHHHHHHHIIIIJJJHHXXXXXXJXXXXXXXXXZZZZZVVVVVSSSZVVZVVVYYYYYYEEEEHHH
+GGGGGGGGGAAAAAAAAJJNNNNNNPPPPPPPPPPOOOOOOOOUUUGGGGGGGGGGGIIIIIIIIIIIIIIIIHHHHHHHHIIIIIIJJJHXXXXXXXWXXFXXXXZZZZZZVZZVVVVVZZZZZVYYYYEYYEEAEHHH
+GGGGGGGGAAAAAAAAAAJNNNNNNNPNPPPPXXXOOOOOOOOOUUGGGGGGGGGGGGIIIIIIIIIIIIHHIIHHHHHHHHHIIIIJJJHXXXXXXXWXFFFXXXXZZZZZZZZZZZVZZZZZZZYYYYEEEEEEHHHH
+GGGGGGGGGGGAAAJJJJJNNNNNNNNNPPPXXXXOOXXOOOOOGGGGGGGGGGGGGGGGIIIIIIIIIIIHHHHHHHHHHHHHHHHHHHHHXXXXXXXXXFFFFXXZZZZZZZZZZZZZZZZZZZZZYYEEEEEHHHHH

2024/go/day13/day13.go

@@ -0,0 +1,58 @@
+package day13
+
+import (
+	"adventofcode2024/utils"
+	_ "adventofcode2024/utils/grid2d"
+	_ "adventofcode2024/utils/inputs"
+	"regexp"
+	_ "fmt"
+	"strings"
+)
+
+func Part1(input string) int {
+	val := 0
+	machines := strings.Split(input, "\n\n")
+	pattern := `Button A: X\+(\d+), Y\+(\d+)\sButton B: X\+(\d+), Y\+(\d+)\sPrize: X=(\d+), Y=(\d+)`
+	re := regexp.MustCompile(pattern)
+	for _, machine := range machines {
+		matches := re.FindStringSubmatch(machine)
+		a := utils.MustAtoi(matches[1])
+		b := utils.MustAtoi(matches[2])
+		c := utils.MustAtoi(matches[3])
+		d := utils.MustAtoi(matches[4])
+		X := utils.MustAtoi(matches[5])
+		Y := utils.MustAtoi(matches[6])
+//		fmt.Println(matches)
+		B := (Y*a - X*b)/(a*d - c*b)
+		A := (X - c*B)/a
+//		fmt.Printf("A: %d B: %d\n", A, B)
+		if (A*a + B*c == X && A*b + B*d == Y) {
+			val += A*3 + B
+		}
+	}
+	return val
+}
+
+func Part2(input string) int {
+	val := 0
+	machines := strings.Split(input, "\n\n")
+	pattern := `Button A: X\+(\d+), Y\+(\d+)\sButton B: X\+(\d+), Y\+(\d+)\sPrize: X=(\d+), Y=(\d+)`
+	re := regexp.MustCompile(pattern)
+	for _, machine := range machines {
+		matches := re.FindStringSubmatch(machine)
+		a := utils.MustAtoi(matches[1])
+		b := utils.MustAtoi(matches[2])
+		c := utils.MustAtoi(matches[3])
+		d := utils.MustAtoi(matches[4])
+		X := utils.MustAtoi(matches[5]) + 10000000000000
+		Y := utils.MustAtoi(matches[6]) + 10000000000000
+//		fmt.Println(matches)
+		B := (Y*a - X*b)/(a*d - c*b)
+		A := (X - c*B)/a
+//		fmt.Printf("A: %d B: %d\n", A, B)
+		if (A*a + B*c == X && A*b + B*d == Y) {
+			val += A*3 + B
+		}
+	}
+	return val
+}

2024/go/day13/day13_test.go

@@ -0,0 +1,45 @@
+package day13
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1(`Button A: X+94, Y+34
+Button B: X+22, Y+67
+Prize: X=8400, Y=5400
+
+Button A: X+26, Y+66
+Button B: X+67, Y+21
+Prize: X=12748, Y=12176
+
+Button A: X+17, Y+86
+Button B: X+84, Y+37
+Prize: X=7870, Y=6450
+
+Button A: X+69, Y+23
+Button B: X+27, Y+71
+Prize: X=18641, Y=10279`)
+	require.Equal(t, 480, r)
+}
+
+func TestPart2(t *testing.T) {
+	r := Part2(`Button A: X+94, Y+34
+Button B: X+22, Y+67
+Prize: X=8400, Y=5400
+
+Button A: X+26, Y+66
+Button B: X+67, Y+21
+Prize: X=12748, Y=12176
+
+Button A: X+17, Y+86
+Button B: X+84, Y+37
+Prize: X=7870, Y=6450
+
+Button A: X+69, Y+23
+Button B: X+27, Y+71
+Prize: X=18641, Y=10279`)
+	require.Equal(t, 480, r)
+}

2024/go/day14/day14.go

@@ -0,0 +1,149 @@
+package day14
+
+import (
+	"adventofcode2024/utils"
+	grid "adventofcode2024/utils/grid2d"
+	"fmt"
+	"regexp"
+	"strings"
+)
+
+type Robot struct {
+	velocity [2]int
+}
+
+const SIZE_X = 101
+const SIZE_Y = 103
+
+func Part1(input string) int {
+	grid := grid.NewGrid(SIZE_X, SIZE_Y, []Robot{})
+	pattern := `p=(-?\d+),(-?\d+) v=(-?\d+),(-?\d+)`
+	re := regexp.MustCompile(pattern)
+	lines := strings.Split(input, "\n")
+	for _, line := range lines {
+		matches := re.FindStringSubmatch(line)
+		fmt.Println(matches)
+		x := utils.MustAtoi(matches[1])
+		y := utils.MustAtoi(matches[2])
+		x1 := utils.MustAtoi(matches[3])
+		y1 := utils.MustAtoi(matches[4])
+		robots := grid.Get(x, y)
+		grid.Set(x, y, append(robots, Robot{velocity: [2]int{x1, y1}}))
+	}
+	fmt.Println(grid.StringWithFormatter(formatter))
+	ng := ticks(grid, 100)
+	fmt.Println(ng.StringWithFormatter(formatter))
+	
+	return get_saftey(ng)
+}
+
+func Part2(input string) int {
+	min_safe := 240096000
+	min_i := 0
+	max_safe := 0
+	max_i := 0
+	grid := grid.NewGrid(SIZE_X, SIZE_Y, []Robot{})
+	pattern := `p=(-?\d+),(-?\d+) v=(-?\d+),(-?\d+)`
+	re := regexp.MustCompile(pattern)
+	lines := strings.Split(input, "\n")
+	for _, line := range lines {
+		matches := re.FindStringSubmatch(line)
+		fmt.Println(matches)
+		x := utils.MustAtoi(matches[1])
+		y := utils.MustAtoi(matches[2])
+		x1 := utils.MustAtoi(matches[3])
+		y1 := utils.MustAtoi(matches[4])
+		robots := grid.Get(x, y)
+		grid.Set(x, y, append(robots, Robot{velocity: [2]int{x1, y1}}))
+	}
+	fmt.Println(grid.StringWithFormatter(formatter))
+	max_safe = get_saftey(grid)
+	for i:=0;i<7380;i++ {
+		ng := ticks(grid, 1)
+		safe := get_saftey(ng)
+		if safe > max_safe {
+			max_safe = safe
+			max_i = i
+		}
+		if safe < min_safe {
+			min_safe = safe
+			min_i = i
+		}
+		grid = ng
+	}
+	for i:=7380;i<7390;i++{
+		ng := ticks(grid, 1)
+		fmt.Println(ng.StringWithFormatter(formatter))
+		grid = ng
+	}
+	fmt.Println(grid.StringWithFormatter(formatter))
+	fmt.Printf("max_safe: %d max_i: %d min_safe: %d min_i:%d", max_safe, max_i, min_safe, min_i)
+	return get_saftey(grid)
+}
+
+func formatter(robots []Robot, x int, y int) string {
+	if len(robots) == 0 {
+		return " "
+	}
+	return "*"
+}
+
+func ticks(g *grid.Grid[[]Robot], seconds int) *grid.Grid[[]Robot] {
+	ng := grid.NewGrid(SIZE_X, SIZE_Y, []Robot{})
+	for y := 0; y < g.SizeY(); y++ {
+		for x := 0; x < g.SizeX(); x++ {
+			for _, robot := range g.Get(x, y) {
+				nx := x + ((robot.velocity[0] * seconds) % SIZE_X)
+				if nx < 0 {
+					nx = g.SizeX() + nx
+				}
+				if nx >= g.SizeX() {
+					nx = nx - g.SizeX()
+				}
+				ny := y + ((robot.velocity[1] * seconds) % SIZE_Y)
+				if ny < 0 {
+					ny = g.SizeY() + ny
+				}
+				if ny >= g.SizeY() {
+					ny = ny - g.SizeY()
+				}
+				robots := ng.Get(nx, ny)
+				ng.Set(nx, ny, append(robots, robot))
+			}
+		}
+	}
+	return ng
+}
+
+func get_saftey(grid *grid.Grid[[]Robot]) int {
+	robots := 0
+	val := 1
+	for y := 0; y < grid.SizeY()/2; y++ {
+		for x := 0; x < grid.SizeX()/2; x++ {
+			robots += len(grid.Get(x, y))
+		}
+	}
+	val *= robots
+	robots = 0
+	for y := 0; y < grid.SizeY()/2; y++ {
+		for x := grid.SizeX()/2 + 1; x < grid.SizeX(); x++ {
+			robots += len(grid.Get(x, y))
+		}
+	}
+	val *= robots
+	robots = 0
+	for y := grid.SizeY()/2 + 1; y < grid.SizeY(); y++ {
+		for x := grid.SizeX()/2 + 1; x < grid.SizeX(); x++ {
+			robots += len(grid.Get(x, y))
+		}
+	}
+	val *= robots
+	robots = 0
+	for y := grid.SizeY()/2 + 1; y < grid.SizeY(); y++ {
+		for x := 0; x < grid.SizeX()/2; x++ {
+			robots += len(grid.Get(x, y))
+		}
+	}
+	val *= robots
+	return val
+}

2024/go/day14/day14_test.go

@@ -0,0 +1,527 @@
+package day14
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1(`p=0,4 v=3,-3
+p=6,3 v=-1,-3
+p=10,3 v=-1,2
+p=2,0 v=2,-1
+p=0,0 v=1,3
+p=3,0 v=-2,-2
+p=7,6 v=-1,-3
+p=3,0 v=-1,-2
+p=9,3 v=2,3
+p=7,3 v=-1,2
+p=2,4 v=2,-3
+p=9,5 v=-3,-3`)
+	require.Equal(t, 12, r)
+}
+
+func TestPart2(t *testing.T) {
+	r := Part2(`p=80,75 v=69,72
+p=88,10 v=-28,-23
+p=79,61 v=79,59
+p=37,102 v=92,-43
+p=12,22 v=-5,-95
+p=60,13 v=-30,-42
+p=3,59 v=-96,-88
+p=85,33 v=-43,-41
+p=44,14 v=63,45
+p=6,6 v=-34,-86
+p=47,102 v=12,42
+p=36,88 v=-88,-93
+p=78,27 v=-18,52
+p=96,64 v=-62,-34
+p=49,99 v=-78,-15
+p=57,31 v=-80,21
+p=25,57 v=8,-84
+p=69,20 v=81,61
+p=80,5 v=-11,-30
+p=2,35 v=-85,77
+p=9,12 v=-4,36
+p=37,68 v=12,-69
+p=47,88 v=-8,-90
+p=72,68 v=59,-86
+p=55,38 v=-68,-94
+p=60,58 v=41,37
+p=76,87 v=-1,-18
+p=89,9 v=38,92
+p=100,67 v=17,-53
+p=83,73 v=80,32
+p=77,19 v=-54,-20
+p=10,86 v=-65,36
+p=13,88 v=-64,-84
+p=50,29 v=-17,-29
+p=79,38 v=89,-57
+p=55,57 v=-68,22
+p=71,82 v=-80,52
+p=37,83 v=-68,-43
+p=25,5 v=81,-22
+p=83,54 v=-32,-75
+p=27,95 v=-77,-55
+p=70,97 v=-72,-4
+p=3,84 v=-60,-60
+p=16,29 v=-35,99
+p=39,39 v=37,-38
+p=76,94 v=90,60
+p=18,21 v=-86,-26
+p=22,84 v=-16,66
+p=45,83 v=-40,-43
+p=35,52 v=54,3
+p=30,21 v=14,36
+p=69,61 v=69,-66
+p=52,22 v=-28,33
+p=9,21 v=-85,-73
+p=87,32 v=79,52
+p=28,85 v=-35,85
+p=32,58 v=-49,89
+p=22,75 v=85,44
+p=45,19 v=-88,61
+p=97,59 v=98,-75
+p=70,81 v=82,7
+p=97,102 v=-23,-8
+p=92,68 v=89,72
+p=24,42 v=-63,-97
+p=21,64 v=-45,-47
+p=58,3 v=-69,51
+p=33,68 v=19,-20
+p=27,6 v=-89,-21
+p=28,81 v=-67,-8
+p=59,83 v=-66,-82
+p=3,14 v=-3,-1
+p=19,65 v=15,-25
+p=57,37 v=53,-29
+p=36,84 v=-4,-84
+p=55,96 v=82,-21
+p=68,101 v=51,51
+p=68,8 v=-90,-30
+p=78,51 v=-51,-63
+p=4,55 v=-63,97
+p=100,60 v=76,-13
+p=7,91 v=-96,-73
+p=97,17 v=-54,33
+p=85,60 v=69,-3
+p=20,39 v=96,-85
+p=24,12 v=86,-84
+p=34,7 v=-7,-36
+p=30,69 v=-67,97
+p=65,17 v=20,33
+p=39,101 v=-7,-83
+p=38,51 v=-90,-4
+p=99,61 v=-13,59
+p=30,1 v=-67,-96
+p=1,89 v=-85,-83
+p=8,1 v=68,4
+p=89,89 v=-52,85
+p=81,5 v=-55,71
+p=99,60 v=-94,-72
+p=68,70 v=-10,78
+p=81,18 v=89,-95
+p=47,61 v=-39,56
+p=91,71 v=85,59
+p=28,66 v=44,-28
+p=10,64 v=-59,-4
+p=84,10 v=-32,-11
+p=29,52 v=-37,34
+p=78,43 v=-92,12
+p=85,3 v=-71,4
+p=37,85 v=-46,-84
+p=56,21 v=21,-32
+p=17,17 v=15,17
+p=26,87 v=45,-93
+p=57,21 v=-6,40
+p=95,48 v=-33,59
+p=38,59 v=65,-72
+p=59,85 v=-50,-99
+p=17,21 v=86,-45
+p=53,3 v=-28,-46
+p=1,40 v=-54,-91
+p=61,13 v=-40,83
+p=33,35 v=-72,-96
+p=40,14 v=33,-8
+p=29,89 v=53,-59
+p=74,0 v=-22,-42
+p=12,32 v=-65,-4
+p=82,89 v=-12,20
+p=35,71 v=-40,20
+p=14,5 v=95,83
+p=46,44 v=39,92
+p=25,54 v=-66,-47
+p=91,78 v=64,53
+p=14,9 v=25,67
+p=39,29 v=-29,8
+p=20,100 v=95,51
+p=59,41 v=92,-82
+p=15,92 v=93,-73
+p=42,93 v=3,-86
+p=82,93 v=-21,-96
+p=50,9 v=12,-39
+p=81,22 v=-13,99
+p=72,81 v=-51,-93
+p=88,19 v=-72,-14
+p=8,93 v=-85,-15
+p=54,2 v=61,8
+p=44,81 v=66,41
+p=78,10 v=90,8
+p=19,53 v=68,4
+p=80,43 v=9,46
+p=11,38 v=-66,88
+p=31,3 v=4,-2
+p=49,28 v=-74,21
+p=27,15 v=54,-88
+p=96,87 v=-50,-67
+p=94,94 v=-5,-97
+p=16,89 v=73,23
+p=93,32 v=-53,93
+p=47,17 v=-29,92
+p=10,78 v=16,35
+p=55,33 v=-60,-17
+p=55,73 v=-68,-22
+p=100,62 v=17,-69
+p=67,91 v=-49,45
+p=68,53 v=-42,-41
+p=35,73 v=54,47
+p=20,63 v=-85,-12
+p=23,16 v=-87,33
+p=70,55 v=50,-16
+p=92,6 v=41,-59
+p=9,97 v=-37,47
+p=48,48 v=42,40
+p=96,37 v=-90,32
+p=66,13 v=-60,91
+p=62,46 v=-50,18
+p=11,15 v=98,77
+p=42,78 v=1,47
+p=10,40 v=15,-48
+p=88,44 v=7,-75
+p=27,53 v=-70,-9
+p=21,7 v=-56,96
+p=92,81 v=-22,69
+p=57,65 v=92,-34
+p=85,63 v=77,11
+p=92,2 v=-30,21
+p=59,16 v=73,-70
+p=16,11 v=86,-89
+p=82,16 v=80,-36
+p=41,30 v=-49,19
+p=13,6 v=14,73
+p=67,99 v=-91,51
+p=37,20 v=-65,-37
+p=85,16 v=99,-14
+p=1,39 v=-44,56
+p=37,29 v=74,5
+p=44,51 v=-18,93
+p=43,9 v=-55,-84
+p=5,10 v=-65,26
+p=51,90 v=-59,-96
+p=55,98 v=-9,23
+p=0,94 v=88,-49
+p=91,43 v=-14,-72
+p=93,43 v=-69,-94
+p=84,100 v=-12,54
+p=23,46 v=85,78
+p=79,37 v=39,-10
+p=1,23 v=99,-79
+p=73,50 v=-51,84
+p=78,58 v=-31,-16
+p=75,44 v=69,71
+p=27,5 v=-87,14
+p=95,91 v=-33,63
+p=22,94 v=-5,-37
+p=36,11 v=-5,-60
+p=18,3 v=-64,-27
+p=44,14 v=24,-92
+p=96,40 v=65,-92
+p=47,1 v=84,25
+p=93,22 v=68,-48
+p=14,32 v=-24,37
+p=99,17 v=78,-89
+p=53,36 v=10,58
+p=44,44 v=-78,-60
+p=15,28 v=-96,-20
+p=96,61 v=-81,-45
+p=58,87 v=-9,7
+p=20,43 v=84,-22
+p=50,42 v=-18,68
+p=74,23 v=-12,42
+p=12,57 v=-94,-94
+p=49,49 v=-89,40
+p=47,98 v=-67,-8
+p=84,17 v=-62,11
+p=31,6 v=-57,-42
+p=28,67 v=66,-81
+p=0,3 v=-88,-13
+p=51,76 v=82,76
+p=67,81 v=87,-14
+p=84,78 v=39,41
+p=39,74 v=72,35
+p=30,10 v=64,-77
+p=10,31 v=11,-4
+p=6,90 v=-4,76
+p=90,24 v=-2,-23
+p=8,39 v=-57,-27
+p=31,69 v=93,-25
+p=79,38 v=39,-35
+p=69,31 v=70,30
+p=1,16 v=7,73
+p=46,9 v=-99,-70
+p=53,16 v=-94,-84
+p=32,60 v=33,-69
+p=62,22 v=-99,-4
+p=66,3 v=98,20
+p=4,76 v=46,-75
+p=50,71 v=-90,22
+p=57,12 v=31,-15
+p=59,84 v=-50,-65
+p=33,0 v=76,-48
+p=58,76 v=-30,44
+p=6,69 v=6,35
+p=74,91 v=-61,-43
+p=36,92 v=-58,60
+p=2,78 v=-48,-98
+p=43,91 v=53,76
+p=34,101 v=-77,79
+p=40,44 v=-68,28
+p=71,64 v=47,-48
+p=54,7 v=84,15
+p=54,75 v=-60,-31
+p=14,40 v=86,12
+p=80,29 v=-92,-26
+p=8,47 v=-33,-69
+p=2,41 v=12,-9
+p=39,60 v=-38,59
+p=13,22 v=86,-20
+p=25,12 v=-57,11
+p=60,47 v=96,96
+p=50,51 v=-48,-82
+p=85,40 v=89,74
+p=99,4 v=-94,-21
+p=75,7 v=29,-73
+p=28,58 v=-80,24
+p=46,94 v=-9,56
+p=24,65 v=-76,62
+p=50,2 v=-20,70
+p=85,55 v=-5,66
+p=38,11 v=43,36
+p=53,54 v=53,24
+p=18,45 v=65,96
+p=94,22 v=16,80
+p=79,28 v=75,-69
+p=30,38 v=-15,-29
+p=5,23 v=-4,49
+p=8,98 v=96,-99
+p=7,60 v=-14,47
+p=96,17 v=88,-73
+p=48,23 v=-41,35
+p=17,31 v=-26,-23
+p=13,52 v=66,37
+p=58,19 v=41,55
+p=25,9 v=-77,-89
+p=3,92 v=55,-80
+p=74,95 v=20,-77
+p=26,70 v=43,72
+p=54,4 v=96,-18
+p=63,8 v=-97,49
+p=23,51 v=87,-75
+p=24,18 v=85,36
+p=8,52 v=6,-13
+p=97,50 v=17,-72
+p=47,66 v=-25,6
+p=38,78 v=3,-93
+p=62,6 v=5,77
+p=56,74 v=-70,-6
+p=94,99 v=9,34
+p=19,92 v=-18,26
+p=35,54 v=-47,-69
+p=92,8 v=-13,42
+p=47,86 v=12,-90
+p=12,83 v=-68,2
+p=0,18 v=-75,-89
+p=11,99 v=-99,14
+p=88,20 v=62,21
+p=27,53 v=53,-47
+p=17,44 v=-5,-91
+p=57,10 v=66,-65
+p=66,95 v=-71,-12
+p=38,21 v=23,95
+p=68,69 v=-31,35
+p=87,71 v=50,72
+p=98,12 v=47,33
+p=94,21 v=66,51
+p=53,97 v=-16,-93
+p=59,35 v=6,39
+p=12,88 v=-86,88
+p=85,16 v=39,8
+p=38,85 v=35,80
+p=44,9 v=-48,11
+p=71,18 v=-82,39
+p=85,14 v=-74,-73
+p=88,22 v=-42,36
+p=8,6 v=-58,38
+p=21,58 v=-66,9
+p=25,17 v=-68,95
+p=89,16 v=-34,-86
+p=33,54 v=64,-88
+p=57,8 v=54,51
+p=40,18 v=-98,58
+p=91,22 v=-34,-53
+p=75,81 v=-70,26
+p=89,70 v=-2,69
+p=62,6 v=-1,-92
+p=78,24 v=-82,-42
+p=47,7 v=-75,83
+p=86,8 v=-63,95
+p=80,64 v=-36,-79
+p=69,95 v=-30,29
+p=46,86 v=85,20
+p=76,35 v=-82,-51
+p=33,15 v=-17,55
+p=40,58 v=-2,-11
+p=76,31 v=39,2
+p=46,82 v=-15,-45
+p=14,53 v=36,-16
+p=98,66 v=68,-3
+p=83,38 v=35,-87
+p=41,9 v=53,70
+p=35,33 v=-68,-68
+p=53,66 v=62,97
+p=75,80 v=49,-62
+p=66,70 v=-50,47
+p=78,80 v=7,64
+p=82,16 v=85,-81
+p=58,25 v=11,-70
+p=36,72 v=33,72
+p=66,92 v=-91,10
+p=24,52 v=-98,22
+p=74,7 v=-36,-79
+p=46,26 v=-61,-90
+p=52,24 v=53,-88
+p=92,26 v=31,78
+p=60,52 v=80,-81
+p=82,78 v=-81,-49
+p=10,3 v=-15,-55
+p=91,31 v=99,77
+p=75,50 v=-91,40
+p=49,71 v=93,91
+p=1,94 v=-54,54
+p=96,50 v=39,18
+p=0,3 v=-53,33
+p=34,9 v=-17,-8
+p=96,28 v=68,-63
+p=25,4 v=66,21
+p=94,74 v=82,-89
+p=47,66 v=-17,87
+p=58,23 v=63,83
+p=13,82 v=-74,75
+p=29,85 v=40,79
+p=57,7 v=50,83
+p=7,88 v=-37,-16
+p=81,61 v=-10,34
+p=6,32 v=33,-60
+p=63,7 v=1,98
+p=59,29 v=-31,-85
+p=85,91 v=19,-18
+p=22,39 v=21,90
+p=25,13 v=75,89
+p=14,100 v=-27,30
+p=33,6 v=97,-53
+p=84,83 v=-22,38
+p=100,69 v=77,-38
+p=2,67 v=-14,-25
+p=71,71 v=-53,73
+p=9,43 v=-52,98
+p=55,76 v=-60,94
+p=49,91 v=-35,-95
+p=77,68 v=26,12
+p=41,91 v=-17,-15
+p=1,69 v=-44,72
+p=32,61 v=4,59
+p=94,12 v=-33,30
+p=1,35 v=96,49
+p=72,64 v=-61,-53
+p=76,93 v=38,-37
+p=97,9 v=33,61
+p=60,32 v=80,18
+p=16,68 v=15,-29
+p=99,72 v=66,44
+p=99,18 v=56,99
+p=42,11 v=-88,11
+p=57,69 v=-2,-2
+p=39,57 v=26,-51
+p=34,15 v=73,42
+p=56,55 v=-61,-75
+p=89,1 v=67,-27
+p=21,100 v=5,70
+p=85,11 v=-35,63
+p=16,35 v=47,-63
+p=98,0 v=93,-2
+p=51,89 v=-9,85
+p=50,32 v=84,-42
+p=29,63 v=78,-76
+p=92,86 v=89,10
+p=27,11 v=-77,51
+p=65,21 v=-59,68
+p=84,68 v=20,-50
+p=19,2 v=-24,-36
+p=25,78 v=25,-85
+p=90,92 v=59,-87
+p=70,100 v=10,-52
+p=48,78 v=3,54
+p=85,81 v=30,44
+p=53,65 v=41,-67
+p=13,95 v=82,-29
+p=5,19 v=95,75
+p=37,96 v=-68,26
+p=83,16 v=-5,-9
+p=31,17 v=4,-20
+p=83,34 v=-83,-76
+p=50,88 v=93,-5
+p=66,36 v=-30,58
+p=11,29 v=-44,83
+p=31,31 v=-77,-51
+p=26,85 v=14,-18
+p=8,76 v=65,69
+p=60,70 v=-40,47
+p=69,70 v=22,64
+p=85,53 v=18,12
+p=97,93 v=-58,-57
+p=52,83 v=92,-9
+p=20,92 v=30,50
+p=88,73 v=32,3
+p=83,16 v=-42,-14
+p=57,89 v=-29,20
+p=50,19 v=73,8
+p=8,101 v=-94,-68
+p=12,77 v=-4,-84
+p=63,28 v=-84,91
+p=46,25 v=13,-95
+p=93,21 v=88,-26
+p=10,54 v=-24,72
+p=69,16 v=-92,-30
+p=26,68 v=21,97
+p=56,30 v=-90,-51
+p=62,69 v=-1,-50
+p=7,6 v=55,-39
+p=63,78 v=76,92
+p=57,55 v=-51,-19
+p=70,62 v=18,37
+p=88,26 v=-61,82
+p=80,50 v=-73,99
+p=40,1 v=-78,86
+p=35,85 v=81,-12
+p=17,74 v=56,47
+p=36,99 v=64,-15
+p=56,18 v=-29,-14
+p=42,44 v=-18,46
+p=84,4 v=-63,-2
+p=97,75 v=27,-62
+p=47,71 v=54,-50
+p=26,101 v=-67,-83
+p=30,74 v=-57,66`)
+	require.Equal(t, 0, r)
+}

2024/go/day14/input.txt

@@ -0,0 +1,500 @@
+p=80,75 v=69,72
+p=88,10 v=-28,-23
+p=79,61 v=79,59
+p=37,102 v=92,-43
+p=12,22 v=-5,-95
+p=60,13 v=-30,-42
+p=3,59 v=-96,-88
+p=85,33 v=-43,-41
+p=44,14 v=63,45
+p=6,6 v=-34,-86
+p=47,102 v=12,42
+p=36,88 v=-88,-93
+p=78,27 v=-18,52
+p=96,64 v=-62,-34
+p=49,99 v=-78,-15
+p=57,31 v=-80,21
+p=25,57 v=8,-84
+p=69,20 v=81,61
+p=80,5 v=-11,-30
+p=2,35 v=-85,77
+p=9,12 v=-4,36
+p=37,68 v=12,-69
+p=47,88 v=-8,-90
+p=72,68 v=59,-86
+p=55,38 v=-68,-94
+p=60,58 v=41,37
+p=76,87 v=-1,-18
+p=89,9 v=38,92
+p=100,67 v=17,-53
+p=83,73 v=80,32
+p=77,19 v=-54,-20
+p=10,86 v=-65,36
+p=13,88 v=-64,-84
+p=50,29 v=-17,-29
+p=79,38 v=89,-57
+p=55,57 v=-68,22
+p=71,82 v=-80,52
+p=37,83 v=-68,-43
+p=25,5 v=81,-22
+p=83,54 v=-32,-75
+p=27,95 v=-77,-55
+p=70,97 v=-72,-4
+p=3,84 v=-60,-60
+p=16,29 v=-35,99
+p=39,39 v=37,-38
+p=76,94 v=90,60
+p=18,21 v=-86,-26
+p=22,84 v=-16,66
+p=45,83 v=-40,-43
+p=35,52 v=54,3
+p=30,21 v=14,36
+p=69,61 v=69,-66
+p=52,22 v=-28,33
+p=9,21 v=-85,-73
+p=87,32 v=79,52
+p=28,85 v=-35,85
+p=32,58 v=-49,89
+p=22,75 v=85,44
+p=45,19 v=-88,61
+p=97,59 v=98,-75
+p=70,81 v=82,7
+p=97,102 v=-23,-8
+p=92,68 v=89,72
+p=24,42 v=-63,-97
+p=21,64 v=-45,-47
+p=58,3 v=-69,51
+p=33,68 v=19,-20
+p=27,6 v=-89,-21
+p=28,81 v=-67,-8
+p=59,83 v=-66,-82
+p=3,14 v=-3,-1
+p=19,65 v=15,-25
+p=57,37 v=53,-29
+p=36,84 v=-4,-84
+p=55,96 v=82,-21
+p=68,101 v=51,51
+p=68,8 v=-90,-30
+p=78,51 v=-51,-63
+p=4,55 v=-63,97
+p=100,60 v=76,-13
+p=7,91 v=-96,-73
+p=97,17 v=-54,33
+p=85,60 v=69,-3
+p=20,39 v=96,-85
+p=24,12 v=86,-84
+p=34,7 v=-7,-36
+p=30,69 v=-67,97
+p=65,17 v=20,33
+p=39,101 v=-7,-83
+p=38,51 v=-90,-4
+p=99,61 v=-13,59
+p=30,1 v=-67,-96
+p=1,89 v=-85,-83
+p=8,1 v=68,4
+p=89,89 v=-52,85
+p=81,5 v=-55,71
+p=99,60 v=-94,-72
+p=68,70 v=-10,78
+p=81,18 v=89,-95
+p=47,61 v=-39,56
+p=91,71 v=85,59
+p=28,66 v=44,-28
+p=10,64 v=-59,-4
+p=84,10 v=-32,-11
+p=29,52 v=-37,34
+p=78,43 v=-92,12
+p=85,3 v=-71,4
+p=37,85 v=-46,-84
+p=56,21 v=21,-32
+p=17,17 v=15,17
+p=26,87 v=45,-93
+p=57,21 v=-6,40
+p=95,48 v=-33,59
+p=38,59 v=65,-72
+p=59,85 v=-50,-99
+p=17,21 v=86,-45
+p=53,3 v=-28,-46
+p=1,40 v=-54,-91
+p=61,13 v=-40,83
+p=33,35 v=-72,-96
+p=40,14 v=33,-8
+p=29,89 v=53,-59
+p=74,0 v=-22,-42
+p=12,32 v=-65,-4
+p=82,89 v=-12,20
+p=35,71 v=-40,20
+p=14,5 v=95,83
+p=46,44 v=39,92
+p=25,54 v=-66,-47
+p=91,78 v=64,53
+p=14,9 v=25,67
+p=39,29 v=-29,8
+p=20,100 v=95,51
+p=59,41 v=92,-82
+p=15,92 v=93,-73
+p=42,93 v=3,-86
+p=82,93 v=-21,-96
+p=50,9 v=12,-39
+p=81,22 v=-13,99
+p=72,81 v=-51,-93
+p=88,19 v=-72,-14
+p=8,93 v=-85,-15
+p=54,2 v=61,8
+p=44,81 v=66,41
+p=78,10 v=90,8
+p=19,53 v=68,4
+p=80,43 v=9,46
+p=11,38 v=-66,88
+p=31,3 v=4,-2
+p=49,28 v=-74,21
+p=27,15 v=54,-88
+p=96,87 v=-50,-67
+p=94,94 v=-5,-97
+p=16,89 v=73,23
+p=93,32 v=-53,93
+p=47,17 v=-29,92
+p=10,78 v=16,35
+p=55,33 v=-60,-17
+p=55,73 v=-68,-22
+p=100,62 v=17,-69
+p=67,91 v=-49,45
+p=68,53 v=-42,-41
+p=35,73 v=54,47
+p=20,63 v=-85,-12
+p=23,16 v=-87,33
+p=70,55 v=50,-16
+p=92,6 v=41,-59
+p=9,97 v=-37,47
+p=48,48 v=42,40
+p=96,37 v=-90,32
+p=66,13 v=-60,91
+p=62,46 v=-50,18
+p=11,15 v=98,77
+p=42,78 v=1,47
+p=10,40 v=15,-48
+p=88,44 v=7,-75
+p=27,53 v=-70,-9
+p=21,7 v=-56,96
+p=92,81 v=-22,69
+p=57,65 v=92,-34
+p=85,63 v=77,11
+p=92,2 v=-30,21
+p=59,16 v=73,-70
+p=16,11 v=86,-89
+p=82,16 v=80,-36
+p=41,30 v=-49,19
+p=13,6 v=14,73
+p=67,99 v=-91,51
+p=37,20 v=-65,-37
+p=85,16 v=99,-14
+p=1,39 v=-44,56
+p=37,29 v=74,5
+p=44,51 v=-18,93
+p=43,9 v=-55,-84
+p=5,10 v=-65,26
+p=51,90 v=-59,-96
+p=55,98 v=-9,23
+p=0,94 v=88,-49
+p=91,43 v=-14,-72
+p=93,43 v=-69,-94
+p=84,100 v=-12,54
+p=23,46 v=85,78
+p=79,37 v=39,-10
+p=1,23 v=99,-79
+p=73,50 v=-51,84
+p=78,58 v=-31,-16
+p=75,44 v=69,71
+p=27,5 v=-87,14
+p=95,91 v=-33,63
+p=22,94 v=-5,-37
+p=36,11 v=-5,-60
+p=18,3 v=-64,-27
+p=44,14 v=24,-92
+p=96,40 v=65,-92
+p=47,1 v=84,25
+p=93,22 v=68,-48
+p=14,32 v=-24,37
+p=99,17 v=78,-89
+p=53,36 v=10,58
+p=44,44 v=-78,-60
+p=15,28 v=-96,-20
+p=96,61 v=-81,-45
+p=58,87 v=-9,7
+p=20,43 v=84,-22
+p=50,42 v=-18,68
+p=74,23 v=-12,42
+p=12,57 v=-94,-94
+p=49,49 v=-89,40
+p=47,98 v=-67,-8
+p=84,17 v=-62,11
+p=31,6 v=-57,-42
+p=28,67 v=66,-81
+p=0,3 v=-88,-13
+p=51,76 v=82,76
+p=67,81 v=87,-14
+p=84,78 v=39,41
+p=39,74 v=72,35
+p=30,10 v=64,-77
+p=10,31 v=11,-4
+p=6,90 v=-4,76
+p=90,24 v=-2,-23
+p=8,39 v=-57,-27
+p=31,69 v=93,-25
+p=79,38 v=39,-35
+p=69,31 v=70,30
+p=1,16 v=7,73
+p=46,9 v=-99,-70
+p=53,16 v=-94,-84
+p=32,60 v=33,-69
+p=62,22 v=-99,-4
+p=66,3 v=98,20
+p=4,76 v=46,-75
+p=50,71 v=-90,22
+p=57,12 v=31,-15
+p=59,84 v=-50,-65
+p=33,0 v=76,-48
+p=58,76 v=-30,44
+p=6,69 v=6,35
+p=74,91 v=-61,-43
+p=36,92 v=-58,60
+p=2,78 v=-48,-98
+p=43,91 v=53,76
+p=34,101 v=-77,79
+p=40,44 v=-68,28
+p=71,64 v=47,-48
+p=54,7 v=84,15
+p=54,75 v=-60,-31
+p=14,40 v=86,12
+p=80,29 v=-92,-26
+p=8,47 v=-33,-69
+p=2,41 v=12,-9
+p=39,60 v=-38,59
+p=13,22 v=86,-20
+p=25,12 v=-57,11
+p=60,47 v=96,96
+p=50,51 v=-48,-82
+p=85,40 v=89,74
+p=99,4 v=-94,-21
+p=75,7 v=29,-73
+p=28,58 v=-80,24
+p=46,94 v=-9,56
+p=24,65 v=-76,62
+p=50,2 v=-20,70
+p=85,55 v=-5,66
+p=38,11 v=43,36
+p=53,54 v=53,24
+p=18,45 v=65,96
+p=94,22 v=16,80
+p=79,28 v=75,-69
+p=30,38 v=-15,-29
+p=5,23 v=-4,49
+p=8,98 v=96,-99
+p=7,60 v=-14,47
+p=96,17 v=88,-73
+p=48,23 v=-41,35
+p=17,31 v=-26,-23
+p=13,52 v=66,37
+p=58,19 v=41,55
+p=25,9 v=-77,-89
+p=3,92 v=55,-80
+p=74,95 v=20,-77
+p=26,70 v=43,72
+p=54,4 v=96,-18
+p=63,8 v=-97,49
+p=23,51 v=87,-75
+p=24,18 v=85,36
+p=8,52 v=6,-13
+p=97,50 v=17,-72
+p=47,66 v=-25,6
+p=38,78 v=3,-93
+p=62,6 v=5,77
+p=56,74 v=-70,-6
+p=94,99 v=9,34
+p=19,92 v=-18,26
+p=35,54 v=-47,-69
+p=92,8 v=-13,42
+p=47,86 v=12,-90
+p=12,83 v=-68,2
+p=0,18 v=-75,-89
+p=11,99 v=-99,14
+p=88,20 v=62,21
+p=27,53 v=53,-47
+p=17,44 v=-5,-91
+p=57,10 v=66,-65
+p=66,95 v=-71,-12
+p=38,21 v=23,95
+p=68,69 v=-31,35
+p=87,71 v=50,72
+p=98,12 v=47,33
+p=94,21 v=66,51
+p=53,97 v=-16,-93
+p=59,35 v=6,39
+p=12,88 v=-86,88
+p=85,16 v=39,8
+p=38,85 v=35,80
+p=44,9 v=-48,11
+p=71,18 v=-82,39
+p=85,14 v=-74,-73
+p=88,22 v=-42,36
+p=8,6 v=-58,38
+p=21,58 v=-66,9
+p=25,17 v=-68,95
+p=89,16 v=-34,-86
+p=33,54 v=64,-88
+p=57,8 v=54,51
+p=40,18 v=-98,58
+p=91,22 v=-34,-53
+p=75,81 v=-70,26
+p=89,70 v=-2,69
+p=62,6 v=-1,-92
+p=78,24 v=-82,-42
+p=47,7 v=-75,83
+p=86,8 v=-63,95
+p=80,64 v=-36,-79
+p=69,95 v=-30,29
+p=46,86 v=85,20
+p=76,35 v=-82,-51
+p=33,15 v=-17,55
+p=40,58 v=-2,-11
+p=76,31 v=39,2
+p=46,82 v=-15,-45
+p=14,53 v=36,-16
+p=98,66 v=68,-3
+p=83,38 v=35,-87
+p=41,9 v=53,70
+p=35,33 v=-68,-68
+p=53,66 v=62,97
+p=75,80 v=49,-62
+p=66,70 v=-50,47
+p=78,80 v=7,64
+p=82,16 v=85,-81
+p=58,25 v=11,-70
+p=36,72 v=33,72
+p=66,92 v=-91,10
+p=24,52 v=-98,22
+p=74,7 v=-36,-79
+p=46,26 v=-61,-90
+p=52,24 v=53,-88
+p=92,26 v=31,78
+p=60,52 v=80,-81
+p=82,78 v=-81,-49
+p=10,3 v=-15,-55
+p=91,31 v=99,77
+p=75,50 v=-91,40
+p=49,71 v=93,91
+p=1,94 v=-54,54
+p=96,50 v=39,18
+p=0,3 v=-53,33
+p=34,9 v=-17,-8
+p=96,28 v=68,-63
+p=25,4 v=66,21
+p=94,74 v=82,-89
+p=47,66 v=-17,87
+p=58,23 v=63,83
+p=13,82 v=-74,75
+p=29,85 v=40,79
+p=57,7 v=50,83
+p=7,88 v=-37,-16
+p=81,61 v=-10,34
+p=6,32 v=33,-60
+p=63,7 v=1,98
+p=59,29 v=-31,-85
+p=85,91 v=19,-18
+p=22,39 v=21,90
+p=25,13 v=75,89
+p=14,100 v=-27,30
+p=33,6 v=97,-53
+p=84,83 v=-22,38
+p=100,69 v=77,-38
+p=2,67 v=-14,-25
+p=71,71 v=-53,73
+p=9,43 v=-52,98
+p=55,76 v=-60,94
+p=49,91 v=-35,-95
+p=77,68 v=26,12
+p=41,91 v=-17,-15
+p=1,69 v=-44,72
+p=32,61 v=4,59
+p=94,12 v=-33,30
+p=1,35 v=96,49
+p=72,64 v=-61,-53
+p=76,93 v=38,-37
+p=97,9 v=33,61
+p=60,32 v=80,18
+p=16,68 v=15,-29
+p=99,72 v=66,44
+p=99,18 v=56,99
+p=42,11 v=-88,11
+p=57,69 v=-2,-2
+p=39,57 v=26,-51
+p=34,15 v=73,42
+p=56,55 v=-61,-75
+p=89,1 v=67,-27
+p=21,100 v=5,70
+p=85,11 v=-35,63
+p=16,35 v=47,-63
+p=98,0 v=93,-2
+p=51,89 v=-9,85
+p=50,32 v=84,-42
+p=29,63 v=78,-76
+p=92,86 v=89,10
+p=27,11 v=-77,51
+p=65,21 v=-59,68
+p=84,68 v=20,-50
+p=19,2 v=-24,-36
+p=25,78 v=25,-85
+p=90,92 v=59,-87
+p=70,100 v=10,-52
+p=48,78 v=3,54
+p=85,81 v=30,44
+p=53,65 v=41,-67
+p=13,95 v=82,-29
+p=5,19 v=95,75
+p=37,96 v=-68,26
+p=83,16 v=-5,-9
+p=31,17 v=4,-20
+p=83,34 v=-83,-76
+p=50,88 v=93,-5
+p=66,36 v=-30,58
+p=11,29 v=-44,83
+p=31,31 v=-77,-51
+p=26,85 v=14,-18
+p=8,76 v=65,69
+p=60,70 v=-40,47
+p=69,70 v=22,64
+p=85,53 v=18,12
+p=97,93 v=-58,-57
+p=52,83 v=92,-9
+p=20,92 v=30,50
+p=88,73 v=32,3
+p=83,16 v=-42,-14
+p=57,89 v=-29,20
+p=50,19 v=73,8
+p=8,101 v=-94,-68
+p=12,77 v=-4,-84
+p=63,28 v=-84,91
+p=46,25 v=13,-95
+p=93,21 v=88,-26
+p=10,54 v=-24,72
+p=69,16 v=-92,-30
+p=26,68 v=21,97
+p=56,30 v=-90,-51
+p=62,69 v=-1,-50
+p=7,6 v=55,-39
+p=63,78 v=76,92
+p=57,55 v=-51,-19
+p=70,62 v=18,37
+p=88,26 v=-61,82
+p=80,50 v=-73,99
+p=40,1 v=-78,86
+p=35,85 v=81,-12
+p=17,74 v=56,47
+p=36,99 v=64,-15
+p=56,18 v=-29,-14
+p=42,44 v=-18,46
+p=84,4 v=-63,-2
+p=97,75 v=27,-62
+p=47,71 v=54,-50
+p=26,101 v=-67,-83
+p=30,74 v=-57,66

2024/go/day15/day15.go

@@ -0,0 +1,119 @@
+package day15
+
+import (
+	_ "adventofcode2024/utils"
+	_ "adventofcode2024/utils/grid2d"
+	_ "adventofcode2024/utils/grid2d"
+	"adventofcode2024/utils/inputs"
+	"fmt"
+	_ "regexp"
+	"strings"
+
+	_ "github.com/deckarep/golang-set/v2"
+)
+
+type Loc struct {
+	x int
+	y int
+}
+
+type Queue struct {
+	elements []Loc
+}
+
+// Push adds an element to the end of the queue
+func (q *Queue) Push(value Loc) {
+	q.elements = append(q.elements, value)
+}
+
+// Pop removes an element from the front of the queue
+func (q *Queue) Pop() (Loc, bool) {
+	if len(q.elements) == 0 {
+		return Loc{}, false // Return zero and false if the queue is empty
+	}
+	value := q.elements[0]
+	q.elements = q.elements[1:] // Remove the first element
+	return value, true
+}
+
+// IsEmpty checks if the queue is empty
+func (q *Queue) IsEmpty() bool {
+	return len(q.elements) == 0
+}
+
+func Part1(input string) int {
+	var val int
+	var rloc Loc
+	in := strings.Split(input, "\n\n")
+	dirs := map[rune][2]int{
+		'<': {-1, 0},
+		'>': {1, 0},
+		'^': {0, -1},
+		'v': {0, 1},
+	}
+	grid := inputs.ToGrid2D(in[0], "\n", "", ',', func(c string) rune { return rune(c[0]) })
+	directions := strings.ReplaceAll(in[1], "\n", "")
+	fmt.Printf("%v\n", grid.StringWithFormatter(formatter))
+	fmt.Printf("%v\n", directions)
+	found := false
+	for x := 0; x < grid.SizeX(); x++ {
+		if found {
+			break
+		}
+		for y := 0; y < grid.SizeY(); y++ {
+			if grid.Get(x, y) == '@' {
+				rloc = Loc{x: x, y: y}
+				found = true
+				break
+			}
+		}
+	}
+	fmt.Printf("Robot: %v\n", rloc)
+	for _, dir := range directions {
+		q := &Queue{}
+		x := rloc.x
+		y := rloc.y
+	Loop:
+		for {
+			x += dirs[dir][0]
+			y += dirs[dir][1]
+			switch grid.Get(x, y) {
+			case 'O':
+				q.Push(Loc{x: x, y: y})
+			case '.':
+				for !q.IsEmpty() {
+					grid.Set(x, y, 'O')
+					loc, _ := q.Pop()
+					fmt.Printf("%d,%d\n", loc.x, loc.y)
+					//					grid.Set(loc.x, loc.y, 'O')
+					x -= dirs[dir][0]
+					y -= dirs[dir][1]
+				}
+				grid.Set(rloc.x, rloc.y, '.')
+				rloc.x = x
+				rloc.y = y
+				grid.Set(rloc.x, rloc.y, '@')
+				break Loop
+			case '#':
+				break Loop
+			}
+		}
+		//		fmt.Printf("%v\n", grid.StringWithFormatter(formatter))
+	}
+	for x := 0; x < grid.SizeX(); x++ {
+		for y := 0; y < grid.SizeY(); y++ {
+			if grid.Get(x, y) == 'O' {
+				val += (100 * y) + x
+			}
+		}
+	}
+	return val
+}
+
+func Part2(input string) int {
+	return 0
+}
+
+func formatter(p rune, x int, y int) string {
+	return string(p)
+}

2024/go/day15/day15_test.go

@@ -0,0 +1,57 @@
+package day15
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1(`##########
+#..O..O.O#
+#......O.#
+#.OO..O.O#
+#..O@..O.#
+#O#..O...#
+#O..O..O.#
+#.OO.O.OO#
+#....O...#
+##########
+
+<vv>^<v^>v>^vv^v>v<>v^v<v<^vv<<<^><<><>>v<vvv<>^v^>^<<<><<v<<<v^vv^v>^
+vvv<<^>^v^^><<>>><>^<<><^vv^^<>vvv<>><^^v>^>vv<>v<<<<v<^v>^<^^>>>^<v<v
+><>vv>v^v^<>><>>>><^^>vv>v<^^^>>v^v^<^^>v^^>v^<^v>v<>>v^v^<v>v^^<^^vv<
+<<v<^>>^^^^>>>v^<>vvv^><v<<<>^^^vv^<vvv>^>v<^^^^v<>^>vvvv><>>v^<<^^^^^
+^><^><>>><>^^<<^^v>>><^<v>^<vv>>v>>>^v><>^v><<<<v>>v<v<v>vvv>^<><<>^><
+^>><>^v<><^vvv<^^<><v<<<<<><^v<<<><<<^^<v<^^^><^>>^<v^><<<^>>^v<v^v<v^
+>^>>^v>vv>^<<^v<>><<><<v<<v><>v<^vv<<<>^^v^>^^>>><<^v>>v^v><^^>>^<>vv^
+<><^^>^^^<><vvvvv^v<v<<>^v<v>v<<^><<><<><<<^^<<<^<<>><<><^^^>^^<>^>v<>
+^^>vv<^v^v<vv>^<><v<^v>^^^>>>^^vvv^>vvv<>>>^<^>>>>>^<<^v>^vvv<>^<><<v>
+v^^>>><<^^<>>^v^<v^vv<>v^<<>^<^v^v><^<<<><<^<v><v<>vv>>v><v^<vv<>v^<<^`)
+	require.Equal(t, 10092, r)
+}
+
+func TestPart2(t *testing.T) {
+	r := Part2(`##########
+#..O..O.O#
+#......O.#
+#.OO..O.O#
+#..O@..O.#
+#O#..O...#
+#O..O..O.#
+#.OO.O.OO#
+#....O...#
+##########
+
+<vv>^<v^>v>^vv^v>v<>v^v<v<^vv<<<^><<><>>v<vvv<>^v^>^<<<><<v<<<v^vv^v>^
+vvv<<^>^v^^><<>>><>^<<><^vv^^<>vvv<>><^^v>^>vv<>v<<<<v<^v>^<^^>>>^<v<v
+><>vv>v^v^<>><>>>><^^>vv>v<^^^>>v^v^<^^>v^^>v^<^v>v<>>v^v^<v>v^^<^^vv<
+<<v<^>>^^^^>>>v^<>vvv^><v<<<>^^^vv^<vvv>^>v<^^^^v<>^>vvvv><>>v^<<^^^^^
+^><^><>>><>^^<<^^v>>><^<v>^<vv>>v>>>^v><>^v><<<<v>>v<v<v>vvv>^<><<>^><
+^>><>^v<><^vvv<^^<><v<<<<<><^v<<<><<<^^<v<^^^><^>>^<v^><<<^>>^v<v^v<v^
+>^>>^v>vv>^<<^v<>><<><<v<<v><>v<^vv<<<>^^v^>^^>>><<^v>>v^v><^^>>^<>vv^
+<><^^>^^^<><vvvvv^v<v<<>^v<v>v<<^><<><<><<<^^<<<^<<>><<><^^^>^^<>^>v<>
+^^>vv<^v^v<vv>^<><v<^v>^^^>>>^^vvv^>vvv<>>>^<^>>>>>^<<^v>^vvv<>^<><<v>
+v^^>>><<^^<>>^v^<v^vv<>v^<<>^<^v^v><^<<<><<^<v><v<>vv>>v><v^<vv<>v^<<^`)
+	require.Equal(t, 0, r)
+}

2024/go/day15/input.txt

@@ -0,0 +1,71 @@
+##################################################
+#...O.#..O....##O..OO.#O..#.#.......OO...#O.#OO..#
+#O#..OO...O..O.O.....O.O.O....OO#.....O#.O.OO..O.#
+#........O....#...O......O.OO...#..O.O.#O#....O..#
+#..O.OO..O..O.#..O.O.OO.O...O...O......#O.....O..#
+#..OO.....O.OO.O#.......O.........O.....O.O.O....#
+#.O.#.O.O#......OO........O.O.....OO..O.O.O.#.#O.#
+#........#.....#.##O....O.O..OOO.......OOO.#O....#
+#.O#.#...OO.....#.......O...O...#O.O.......OO..OO#
+#.O...O..#O...#O..O.........O.O..OO..O.......O.OO#
+#O.O......O.OO..O.O.......O.OO#O.##...#....#O.O.O#
+#.O...O.OO.O....O..O.O...O...#.O....OO..O.O#O#OO.#
+#.....O.O..#O.....O.O..##O.O#OO...O...O.O.O......#
+##..O...O..OO.O.O.O..OO........#.##.........O.O..#
+#..O...O.OO..OOO.O...#..#.........#.O....OO......#
+#O....OOO.OO...O##.O.OO..O.O.....O.O.OOO....O.O.O#
+#O.O..OO.O..OO............O....O....O..OO...OO..##
+#.O...O.O.O.....O..O.O...O.#.......OOO...........#
+#O.O...O.....#..O..#O...O.O.O....O#...#.###.....O#
+#.O...O.O..#O.#.OO.......O.OO.O...O...........O..#
+##O.#O....O.#............O..O..O.....O..O..OO....#
+##..#.OO.O.OO.#.O....O...#........#........O.O...#
+#..O.OO...O....#..OO.O...........OOOO#..OO#O.....#
+#OO.O#...#..#...O#........O.OOO...OO....#O.OO#OOO#
+#...OOO............#O.#.@...O.....O#.#.O...O..O..#
+#...O...OO.#..O......O..............#OOO......OOO#
+#..#OO...O.#O......O..OO.O#...O....OO..O...O.O#O.#
+#.#.##...#O........#.O.....#O#.O.OO..OOO..#..O...#
+#.#....#...O..O#O..OOO.....#....#......O...O...#.#
+#....O....O......O.O.O..........O.O..O.O......O..#
+#.#OO#O.OO............O##.##O.O#.O...O#.........O#
+##.O.#..........#......#OOOO.OO.#.O.O.O.....O..#.#
+#O.....#OO.....O..............#...O.O..O.....OO#.#
+#O.O.O..O#OO.O.O....O..O......O..O........OO.....#
+##O....O...............................#.O.....O##
+##..O...#...O.........O#...#O...O.OO......OO.O..O#
+#O..OO.....OOOO.#......O.#OO..O.O...O.O...O.O.O#.#
+#..O.....O.O........O.....O.....O#....OO##OOO..#O#
+#O..##....OOO..O#.O....O.#...O.....O.O.O......O.O#
+#..OO.#O.......O.OO.O#O.O.....O.....OO..OO.OOOO..#
+#.#.#OO.O..O.O........O#.#...#..O.O.O.#.O..OO.O.O#
+#..O#.OO.O.#.....O...O..OO#..O...O.O#...O.....#.O#
+#.OO.OO....O.O..O..#OO.....#......#.#OO..#.#O.O#.#
+#...O....#..#......O....O..O#O...O....OO.......O.#
+#.#.....O#.......O..O..#O.OOOO..........O.O......#
+#.O.O.....OO.O.O.O..#O.O.O..O.OO....O....##.....##
+#O..#.OOO##....O.O..OOOO.O...O..O#..........O....#
+##.O##...O.O.....O.O#...O.........#...........OOO#
+#O#O.....#..O.OOO...O..OO.....OOO............#O..#
+##################################################
+
+^^<^>^^<<^v>^><^^^<v<v^>^^<><^v>v<^vv>^v<^>>v>^vv<<vv>>>>>>v^>v>^>^v<^v^<v^<^v>>^^>v<<>>^v^<v<v>v<v<v^<>>^>v^>^^^<^<v<v<<<v<^vv>^v>>v<v^>><vvv>^>v<^^vvv<>vvv<^v<>v><><^^<>v^^<^><v^><>>^^>v^<v>>^<><<^><<>v>>vvv<^^v^v^><vv>>v^^><v^<<^v>^vv<^<^<^<><>>>^><vv>>^<v^<><><^v<^<^v<^^>^<><<^<<^vv^^v<vv^^>^<^<v^v^^<v^>^v<vvv^vv<^^<^^>v>>^v>^v><v^^^v>^<^<v<^>>^><>^v<>v>^^^<^vv^^<^v<vv>><^^^v<<>>>^<^^>^<v>v>><v^v<<<v>^<vv<^<v^>^<^<v^<>^><v<>^>><<^><vv>>vv<>v^<vvv^<v><v^vv>^<<><vvv>^<><>^^v<^v<<>vv><^>><^<<v<^>^>>^^>v<^>v^>^<vv><v><<^^^^v^<>^>^v^^v<v^<v>v<><<<v>vv^v><vv^>>>v>>>>><v<vvvv<<^v>^v>^<><<<><>v<vv<v><>^vv>v<>^v^<>>v<v>>>v^>^<vv^^<v<^<^>vv^vvv^^<<>vv>^>^v>>v^^vv<^v>^^vv<>^v>^>v^^<>^^><vvvvvv<^^>^^v<>^^^<^^<>^>^v><v><<>>^<>>v>>^><^>v<v><>v^v<v><>^<<>>v>^v<vv><>^v<^>^^v>v>>^<^^^<<vvv><<v><<>vvv^v><<v^vv><^^^v^^^>v><<^^v>vv^v><v>^>^v<>>vv<<^v<v><>v><^><>>^vv><>><<vv^v<^^>><<>>v>><><vv>v^^<^<v<<^vv^<^^<v^<vv<<v<>v<>^<^<^>v^^^>>v<^^<^^^>^^>^>^>^^<><vvv>v>v<vv<^v<^>vv^<vv>v^>^<^<>v>^^>v<^>v>v>><>
+^vv>>>^vv><^v^<>v>^><<v>^^<v^v<v^>^>^v>><>>^>^<<^^v^^vv>^v^<<v>^v^>v<v>v<<>^>vvv>v>^vvv>>vv^>v^^v^^v<v^v>v^^<><<<^^><<^<vv<>>>>^<>v><v>>^v<v<<vv>>v>><>v><<^v^><>v><v^^<>v>^>>^^><>v<v<^vv<^v>>^><v>^v>^>><<<^vv<>^<<^><^<<><>vv^^v<<>v>v^vvv<v^>>^>^>^<>v<>vv>^><vv>>v<v<>^^v<>><>>v<>>^^<>v^<v^v^v>vvv<><^^v^>vv<<v>^^>>>v>^>^^><<^v><v^>^^>>^^>v<<<v^><><<><>vv^>v>v^>vv><^<v^><>><<>^>vv<<<v>>v><^^<v^><v>^>v^^<^v>v^<<v^>><v^>^<<>^^vvv>vvv><<><^><>>><<>>^><v<<v><^<v<>>^><><^^vv<^>^vvv<^>>><<^>><^v<v^<vv<v><<v^^v^<><^>v>^v>v<v<<>>><v>^vv^>>><v^><^>v^<>>v>v^v^><^<vv>v^v^<^v<>^><^>>v^^>v<^^^<v^^v>v>v>^^^<^^><v<vv<^vv^<vv<<<><><^>>v<>v<^v>^^<>v^>^v<v^<vv^v>v<<<v>^<^v^^^>v^vv<>vv>^^<<><^><vv>><<^v<^>v>>^>><<^<>vv^>v><>^vv^^v>v<<>^<><^^>^^><^>>^v>vvvv>^>v><<^<v^v<^<<^^<>^><^v^<<v<>^v><^>vvv><^v<>><<^^>^<^<<v^^^<^v><<<v<<>v>^v^>^>vv^<><v^^<><><>^^<^v^^>^^^^^vv<<<v^<vv<<<v^^<v<^<<v><vv^<<<<<<^^^vv><^vv<<<>><>v>vv>^^^<^><><<><<v<><>><^vv^^<<v^<^^^>v<>^^^^<><^^^<vv><>^^<><<>><vv>>^<>v<v^v<<vv^>^^>^^>>^v>v^
+^>>v<><<<vvv^^^<vv><<<vvv>v<<<<^v<>v<<^vv<^vv<^^>>v^>^v^>^<>>>v<^<<^^>>vv^^<^^^>^><vv<v<v^^v<vv^<<^v<<^v<v<v><>>>vv<>vv<>^^>vv^vvvv<v>vv<vv^^>^<v<vvvv^>v>^^<<^<<<>v>^<^<v>v>vv<<v<^vv>>^^<v<v<v<>>^>><^<v<<>^^v<>^<^v>^><><<vv<^><<^><>^>^^vv^>^<<<^>^v>^v<<<>^^<^^<<^<v><^^<>^<<<^v^<>^>vv<vvv>v><<<^vv^<^><>><><>v^^>v<^<^vv<>><^>v>^v<><>>^v^^^^v^<<><^^v>><>^v^<v^><>>^<vv>v>v^^v<^v><>>v<v^v<v<v>><^^<<^v<>v<<^<v>^>><<<^>>v<v<<^^v<v>v>^<^>^<^v^<^v>>>>>><^vv<v<v^<^v^<<><^>v>>v<vv>^<vv<<v^v>>>vvv<v<vv<<<^v<v<>^vvvvvvv>^^>>>^v<>><>^<<<>^><^^v^v<>><^>^>v><<v>>>v^>^<^<^<v^vv>><<^<>vv^^v^<>v<<<^>>v<v>vv^>><<^<^^><^^>>>v>^^^>^v<v>v<v^<v^>^<<>^^^<^v>><>>>>v^<>>^^^<>v^^v^>><<>v>>^>^vvv<v>><>^v>vv^v>><vvvvv^>^><>^>v<<^>><^^v><^<v^^>>^^>^>vv><<<^vvvvv<^<^<<vv>^<^^<>v^^>^v<^^v<>v>^>^>vv^>v>^<vvv<<^<>^<^<^^v><^<^^v^<vv>v<>>^>v^v<^v>>><^v<^<<^v<^vv^^><>^v<><^><v^v>v<>vvv^^^>^^^^^v<^^^<v^<^>^v<<v<^^v<^v^<<^>><<>>>v^v<>v^^^>^vv>v>v>>><><v^<v><vv<>v>vvvv>v>>vvv><v<v^<^<v<^vvv>^<v<>v<>^^v^<^vv^^>^^>>vv<><^vv><v<
+<^^>^<^>><<>>v>vv^vv<^<<<<>^v<<>>^v<>>>^v><<<><^<^><>>><vv<v<v^<>>v^>v<><v^><^v>v^>^^v^^>v<<v<<v^^^<>v<^v^^<<<^v^^vv^v<v>v>vv^>^^v<vv^<<^>v^<^^<vvv><^>>>>^><<>^><vvv>^v^<^v>v^v><<>v^<>>v^^^<v>><<^>^>^<^vvv>><v<<>^<^><<v>^v>^^<><^^^>^><vvvv><^^><v>>v^vvv><vvv<^^v^v<v<><^<<v^>v>>^<<<<>^v<v>v^>^<^<<>><^>vvv>v>>v^><><>vv>>^vv>>vv<^<>^^^>^>v>^v><^v^>v^<v^v^^^>^v^>^>vv<vvv^<<^<>vvv<vv^<vv<<<v^^>v<<^^<^<>^^^v<v<^>><>><<<^^<>v<>vv<^<^v^v>v>v^vv^v<<v<^>^v<v^^v>^<<<<^^<<>v<<<<<>v<^<v>vv<>^<><v^^v^^<v^^<<vv<v^vv^>><><^<^^<^<>v<>^<<<<v^<<^<<vv<v<>>vv<<vv>^vv<>^^<>v><<v>><vv^^^^><<<^<^>v^vv>vvvv^>v<<v<>^^^v<<<><v<v^^><v^v>>^>>^>><v<<>vv>>>v>v^<<<v<^<<>>^^<v^vv<^^<v<v^^<>v>v^<vv<v<<>>^<^^<^^>><^^>v>v>^^>v>>>^<>^^v^v>^^<^v>^v><<<vv>v^>v^<v^><v^<^>vvv><<^>>v^^>>>^<v^v^>vvv<v<>v^>^^v^^>vvv>^v^^<v^<<v^<<<>^v^<^<vvv<<<<<v<<vv^<v>>v>>><v>^^<><>v<vv^>v>^vvv<<>>v<v<>^<>^<^<<v<<vv^<v^^<<^<^v<^<^>vv^<<vv^<^vv>v>v><^^>^><vv>vv<^<v<>^<^^v<><vvv<<>^vvv^^v<v<v<^<>^vv>>^>v>v<^^<>vv>^<<>^^^>^<^<^>v>vv^^><>^>^v>>^<>
+^<^^<^>v<^<^>^^>><<<>v<^^><>>^^<^^>^v^^><^v^^<^vv><>>v<^v^>>>^<>>^>^>^<<v>>^^^<^v<>vv^v^^<^>v>^>><<>>v<><^<<v<v><<>v>>^<><v<v<>>>>v>^v^<<<>^vv<<v><^>vv>vv>><v^v^^v<<<^<<<^vv><^><><<>v><vv<><^<<v<<vv^vv<^>>v>>>><><>^<v^^>vv<^v^vv><<^>v>v<<><>^>^v<^>v>v<>v<<>^vv<vv>>v><>><<<>>^^^<^^^^<<v^<<v><v<v<v>>^>>vv>^v<^>>vv>^^v>^vv^<v<^^v>^<v<v>^v><v>v>>><<<>>>v>vv<^>^v>v<vv^^v<^<v^^v<^v><v^>v^^^<><>v<^>><^vv>^<<^<>><<<<^<vv^<v<<v^>^>^^<v^<^vvvv<<v^><><>v><<^v<<<<<^v<v><v<<^<<v<>>v<^^v<<^<>^><<v^v^><<>>v<<^v>v>>>v<>>v><><^vv<vv><^^<<v^vv<^>v>v<v^<<<<v>v^<>^^>>>><<<>^^^^v>v>>>>^v><<^^<vv>>v^<<v^^<^v^v>v<>>^^v>^><^v>^>^^vvvvv<v>>^>v<v<^<>>v><vvv>v>v^^<v>^>^<><<^^^^<<v^<v>>^<^<vv<<^^^v>v>^>><v>>><v<>vv>>>v^>^><^^v>>^>>vv<^^<>><v>vv^^v<v<>^<>>>vvv<>^>vv^<<^<^<>vv>^>v>v<^<<><<vv^<<>^v^<^^^<^^^^vv^>^^>^^>><>^<^>v>v<^>>^^^^>^^><<v><v>>vv><^<vv^<v^v^vv>^>v>^^^^v><v>^v>^v<^v^>v>^<v<^v<v><v<<v^>>^^^>v>v^^v^<v>v>^v<^<v^^^v^>^^>^>vv^^vv>vv>v^v<^<^vv^><v^vv<<^>^^<v>v>^vvvv<>^^v<><vv>><<<vv>v<^>><><^><>>^<v^<><
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