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2 Commits

Author SHA1 Message Date
f8c29be7ef day9 2024-12-09 16:46:10 +00:00
19c4afdc98 days 2024-12-08 20:51:22 +00:00
30 changed files with 1909 additions and 6681 deletions

View File

@@ -1,90 +0,0 @@
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
}

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@@ -1,33 +0,0 @@
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)
}

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@@ -1,850 +0,0 @@
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728: 567 6 23 42 90
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83647: 8 828 47
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18714: 89 265 5 13 4 43 1 3
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986: 919 65 2
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2164: 20 62 3 7 8 8 76
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280258704: 396 16 217 528 81
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628: 2 96 5 6 10
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485809: 9 597 19 6 996 5
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24625387: 9 6 8 6 9 37 846 38 3 8 8
4318272002: 10 7 2 3 80 6 5 2 7 306 2
49392736: 80 63 4 72 34 2 944 2
97244751876: 3 45 6 3 7 293 8 5 9 2 3 1
2827209446: 384 6 35 4 9 6 7 3 441 5
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314242938: 77 30 223 22 610 218
654638167: 14 95 6 631 7 169
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1618: 80 4 7 711 59
33287: 1 822 40 354 48 2 3
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713339897: 9 7 5 8 9 30 430
131670050047: 231 19 75 12 5 1 4 8
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2481710424: 1 58 9 49 1 3 96 5 9 3 8 3
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88734868: 3 6 9 8 9 2 7 5 4 838 725
280240227: 2 981 23 1 48 94
343965: 6 35 67 885 23
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181098129983: 36 3 6 1 3 399 7 9 8 1 8 6
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11912: 3 167 581 43 15
54194003: 24 5 7 50 632
40135618285: 5 5 5 4 8 7 7 38 182 8 3 5
8817032: 460 2 2 6 4 4 7 2 57 728
236071: 566 414 610 196 941
1699: 874 26 799
9082: 59 85 7 9 10
14399715: 7 6 5 84 32 1 9 9 8 756 7
957922: 5 76 282 265 853
519850: 854 1 1 608 8
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79732051: 8 1 7 80 45 5 221 629 8
193315: 5 329 577 536 60
443120: 71 7 62 5 764 4
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25055194: 241 48 900 7 194
148742749564: 341 93 73 435 240 65
2975722: 802 811 6 919 2
69614316: 3 9 65 34 9 9 6 3 1 96 59
9211672: 92 116 51 20
1384: 5 687 2
2227754259: 312 1 75 78 952
1980: 6 46 5 70 6
1051: 74 41 921 7 8
7224: 69 9 6 405 7
100058717: 58 44 628 7 145 31 9 8
13325842: 86 4 981 7 534 49 5 9
135606016: 86 1 1 7 2 4 8 877 96 8
188416: 4 8 735 32 8
13081748: 306 58 2 737
3408461: 654 396 4 34 348 94 9
19518: 2 1 8 9 1 54 9 25 9 616 2
31719: 65 6 9 78 597
246572: 26 98 9 4 393 9 81 2 8
127805458: 40 71 9 1 5 457
7811: 198 16 5 7 31 1 4 794 6
1168319105: 5 2 1 2 4 44 8 93 9 12 8 8
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4028985022: 77 86 48 505 604
127755655140: 73 70 5 3 8 31 5 140
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956027222: 455 20 5 10 4 3 5 7
332644: 63 1 8 660 4
739903: 8 744 1 67 3 630 9 1 5
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3162: 88 4 6 9 7 3 53 7 9 17
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397: 88 299 1 1 9
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1397068088398: 419 2 5 161 5 6 4 414 1
5172: 6 431 2
7637: 251 9 85 746 7
1812: 908 35 789 3 77
1120: 7 9 1 68 9 2 4
770138283: 11 6 57 1 3 8 947 9 1 3 3
163644: 610 32 344 63 156
6168: 137 5 9
507: 41 9 2 76 60
593693: 77 77 16 765 9
1214074355: 9 4 5 3 9 73 5 7 8 4 855 8
607244471: 6 3 7 3 1 83 2 510 2 4 6 8
275: 26 2 9 2 2
250040507: 24 9 455 585 504
5137920095731: 44 7 438 78 3 23 573 2
282926819: 6 4 827 26 812 42 3 32
80952: 37 2 6 948 2
8890436: 635 2 7 43 8
10600: 2 1 8 8 6 6 8 3 91 541 6 5
23840: 5 86 1 9 4 1 7 511 57 5
283368: 3 8 8 322 8
1123947090: 49 3 877 8 1 323 9 342
25775616: 8 8 6 97 692
243687944: 650 5 815 32 92
2855764: 2 1 912 730 1
2736185924: 835 66 2 53 8 3 31 3 2 2

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@@ -1,89 +0,0 @@
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
}

View File

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

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

View File

@@ -1,76 +0,0 @@
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
}

View File

@@ -1,45 +0,0 @@
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)
}

File diff suppressed because it is too large Load Diff

View File

@@ -1,156 +0,0 @@
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]
}

View File

@@ -1,65 +0,0 @@
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)
}

File diff suppressed because it is too large Load Diff

View File

@@ -1,90 +0,0 @@
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
}

View File

@@ -1,35 +0,0 @@
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)
}

View File

@@ -1,402 +0,0 @@
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
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ubrwbrbrggrwgbwbwwuwwguurbubwrbgwwrubbrwuwururwrr
gggrwbgwbwuwrubrguwggruubrggwgbrbguwrbrgwuurbwggrggrwwwrb
wuurugububruuwuggwuuwgbwwbrbwgrrrubwbuuwu
grrrwrwgwuwrburruuwwubgubwwwrrrwbwwbggrbrgr
gugrrubugrgrwgggggrbrbrwgguurrwurgrbuggrrbbwgwwwbuu
wubuwgwuwrrubbwuwwrburrwbrrubgurbggbbubrwrguwururgww
ubbrgurrbgbrbwguggugwrrrurwwwugbgrwwbuwrbggrgwwrgwbrwwuugb
bgwbwwwrrgugwwwugruwrbgrbrwbwbrwurbgruwgrggwruururb
guwurburwrguurwbggrrwwugurguwbubbrggrggrubrbbbrwwbgw
wgwuurwrgubguugbbgrrwbwgrwbwrwgbwrwburggrgbbuuw
grbgrruuwrgwwuburwggbubbbgwwrgrbubggwrwbuurwwbuubuwrgwb
bbwuubwuuwwubrwrwgbbrgwwurwbbwwburwuwwwubwrubguubggruwbbg
rrugrwurbugrrbggburwurbbgbuugwwrgbwrbrwbgbgrbwbuuww
gubwuubuwrrwgbuwbwguubuwwbwwrrwgbwbuwgguguwuwbwu
rrbbubrrrwubrrwwbrrbwrbwugbrbrggwbgrwgugwuugg
uurwrgruuwbwuubbrwubrwuuwwgubwgrwbbwgbwwwrbgugrbwururgurb
rbwbbrguggubguurrrrburuwrrubgbgrwrbugrrrgruburwb
grggbggwrubwwwwgrurwgbwuubguwrrrbgubruguub
rrbgbggwbwbrbrrwwgbbggrruwgggurgbrbrwubwuurrbbbwgrbrgrurr
gububbuuguwgbgrwgwgruburwrgwgbbrbrruururrrubrgggwwrbgb
ruurrgggbwbrggwggrurgrwgwbgburwwuwgubggubru
rbrrwgrgrrwrbwbrbggbwrwwuwrbwuwuuwbgbrwrgrwwgbuugbugg
wwbwrrbrrruuwrrwgggruwbubrrwrwuwwurwurbrbrrrw
wbguwwwwwguuuwuubrwgrgwguugrbrruwwrwgugbbb
rrggwbububgbgbguggwwgurbgbwuwwrwrgwuuwruggu
rbguubrrbrgwwgwbgrwrbrggwuwguuuwbwbwwbuwgr
wgbrrguuurgggrwgwgbrbguugrururubruugrrrrgbrgugbg
bgurwgugurwwbuugwurrgurwwrgwgubgrrgururubguuuwugbg
rwbbuwuwbgwbbwurbubwwugbgrbugrbuurbwwbrrwruwrrrwww
rbrburwwbwugrggwrrrruwwgbrgurbwwrrburbbggugbwbu
burgwubggburuuguuwrwbbgbuguguwwburububwrrgw
gggubgbgbwgrggrbrbrgguruurwbrrwubbrbruwgwbu
wggruwwgbwgguwgbgbggrbggbbbwbwwwrgrwwggwrgguuwwgwubgru
bbrwwruugwwbbbwububuuwruburbwbbgrwbburrgbbrub
gwggggwgguuburrgrgugrwgwrbbggggurgugugrgrgwwbr
gggbbugwgbwgwugrrgbwrrwurrgugburrggrruugurbrugrbbbg
gbwrwggbuggurrgubuguubrbgwbrubgwgrbrwubbgrr
bwuwgurrrgwwgguubggwwuurbbrbbwgwggwuwgbbwrwrburgr
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rguuurgbrbrbuubgbuuggrwrwgrwugwrwgbwbbwbbgg
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rbuuwwwrrrurgrgbrbbbrrbbwwwgwgwuwgbwggrbbwbruwwwwbg
wwgwuurrurrbbgwuwwbgrbbrbruugwwgugbrbrgguuwrugwuguurbgwrru
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grbgrrbrwggurbbrwugrwbbrurwrwbruuggwrggrrgrgwwbuwbgurb
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uurgwruubgrbgubbwrubbggrububgrwwrubwwbrgbbu
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wurbgrggbggbwwgwwbbgbbrurrrwggrwwrbrbrwrbg
ggwwrrbbwgubrgrgrgwuububrbrggbwwbubgbbgwubrgwrbururu
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grbbrwbrgwgrgubuwbuwbrwuwugrbwuwwguwrbwbwwbuurgbwgw
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urwbggurwbwguurugbrbwbrbgwrgrbbrubrubburuwrburww
wbbrbwwwwrbruubggwrurgugbgbbuwgrrrrwugbwwwr
ubugrwubbgbrrrrgguugurgbubwgruuwrrgrbguuuw
rrruwrgwrggwburgugwbwwwbggubuwbwuuurrggwwbwrgwgwggbguubw
rgrgbrguruguwrggbrgruwrrbgbbbwugbrbgrbrrrggrubwuubwwbguw
rbggwgugrbwbrbwurbrugrwbbbwuuuwrwgbbbrwbuwgbwrgggurbwug
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gwwwgbrguruuwggwugguuwwrbwgbgwuwuuwrgruguwrbugurrwruw
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bwuuguwwrbbgrwubbbrwwwrrururbwgbrrrrwbrbgrbgbbu
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wugrrubbggwurburggurrgggwuwwuguugrggurrgburrbrbrwgwbuwbg
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bwugrruubwwrbwbrrrbrrrbbgwrruwwbrgubugrgbwgbbrbgrwgwwwggr
wgugrrbbubgbgrrbbrwguwgbbgbwggwuuurrwgwbwrgwwuuw
wururbruwwwwurwgurwbwbuburrgruuwrbuguggwgubrgrruwwgwbbg
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rwuuguburgwruwrgbbuwggugbwrwuubrugrrruuwgggubbuwbrugrwuu
bgwubwuurwurbgugbuugbgrrugwrbwgrwrrwbgwwwgrguwwububuwbg
urbgbbgrrbuwrrguwrwuwrbbwgubwurugguwugururwruuubbgurrbg
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View File

@@ -1,7 +1,7 @@
package main package main
import ( import (
"aoc2024/day19" "aoc2024/day04"
"fmt" "fmt"
"os" "os"
"time" "time"
@@ -9,9 +9,9 @@ import (
func main() { func main() {
start := time.Now() start := time.Now()
data, _ := os.ReadFile("day19/input.txt") data, _ := os.ReadFile("day04/input.txt")
fmt.Printf("part 1: %d\n", day19.Part1(string(data))) fmt.Printf("part 1: %d\n", day04.Part1(string(data)))
fmt.Printf("part 2: %d\n", day19.Part2(string(data))) fmt.Printf("part 2: %d\n", day04.Part2(string(data)))
elapsed := time.Since(start) elapsed := time.Since(start)
fmt.Printf("Execution time: %s\n", elapsed) fmt.Printf("Execution time: %s\n", elapsed)
} }

291
2024/go/day06/day06.go Normal file
View File

@@ -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
}

View File

@@ -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)
}

130
2024/go/day06/input.txt Normal file
View File

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

140
2024/go/day07/day07.go Normal file
View File

@@ -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
}

View File

@@ -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)
}

850
2024/go/day07/input.txt Normal file
View File

@@ -0,0 +1,850 @@
16183610: 62 7 96 8 6 8 52 3 3 47
408936528: 5 1 5 1 9 2 2 8 7 1 725 63
20378697464: 101 893 487 2 6 4
376576: 4 9 235 57 1 3 6 722 8
431880008: 18 66 276 5 295 4 5 7 1
379520346363: 858 95 723 8 92 7 9 2
18243750: 76 24 3 750
7302: 806 446 391 791 3
18879037: 7 75 1 94 217 37
3887037856: 805 64 71 7 9 856
120267: 3 48 937 659 3 69
757199: 86 2 69 7 7 8 80 5 8 743
5835692: 349 65 110 8 1 8 35 4
9693533: 560 33 54 523 251
1691420808: 33 720 4 76 84 66
27537: 5 2 2 4 296 73 89
3099946535: 7 330 5 245 9 4 5 3 7 3 5
2430252: 58 1 3 9 47 71 5 19 418
379232792: 789 98 6 71 6 8 535 8 2
11690268: 2 92 3 2 83 72 1 3 1 6 8 4
65091: 225 4 895 1 9 6 5 6 81
230263117372: 405 38 568 727 7 372
1071440: 6 4 614 67 30 4 7 1 229
60445800: 3 7 9 9 9 683 27 8 4 4
6834722563: 95 43 29 182 9 317
449482: 98 1 458 99 85
381868494: 74 992 18 289 78
42075: 86 3 28 14 38 18 225
105275: 13 751 755 4 91
1258023882: 4 79 534 502 61 3 3 9
766505: 7 87 21 4 4 7 83 5
4569436040: 355 7 6 3 4 7 8 753 4 29
182512: 4 1 7 1 6 66 38 8 6 112
238680: 9 42 36 65 2
81450600: 235 52 86 6 275 2
20684471: 2 989 98 2 4 237 3 7 59
79521192: 48 98 9 91 5 15 29 18
604195918: 756 74 12 2 9 52 7 8
43646875223: 62 28 8 5 6 8 730 3 2 3
24683153283: 5 12 2 2 462 2 72 24 3
13641: 21 664 2 3 655 5 61
23364264: 35 5 9 43 39 2 520 8 33
1352375279: 9 21 54 9 84 61 527
122558095823: 51 58 4 676 99 6 3 7 2 9
9153847: 912 3 1 38 47
623510: 25 63 6 30 892 86 2 5
100277100: 352 773 45 20 90 22
19779196416: 7 239 64 716 2 129
5982828: 86 3 644 9 2 271 66 4
1287462: 3 25 68 2 93 15 6 22
11178753676: 9 9 69 3 7 2 4 8 2 6 8 8
38798: 3 314 4 4 71 38
15055: 1 43 7 52 3
58769: 813 2 4 4 3 1 1 8 3 47 7 5
716958509: 2 343 612 33 69 5
1675: 1 28 41 19 467
39178: 3 873 40 3 1 9
708235: 340 13 9 2 50 385
61112: 7 52 2 107 5
9420: 2 9 5 70 4 13 2 468 8
23543454: 8 478 2 87 242
35262945144: 26 81 91 441 184
357858: 68 4 6 9 92 7 9 92 54
2718246046: 1 85 4 95 53 7 7 5 6 2 2 6
575: 519 2 49 3 2
1180: 172 18 58 44 888
1206891306: 2 9 1 67 80 9 1 2 9 8 5 3
1968096: 6 5 545 39 7 5 2 21 6 6 4
74504: 744 97 7
452256: 8 355 5 796 81 168
418262248: 541 1 482 802 2
152402250369: 4 87 8 8 6 319 65 369
123797905: 9 7 550 577 1 7 2 5 3 5 7
3129360: 73 1 7 5 62 59 20
13030160: 58 9 4 748 65
3758143: 7 80 6 44 6 7 1 4 17 9 4
1058: 521 534 3
6027582: 8 55 704 838 2
55923132: 971 9 7 137 1 6
42362711: 423 614 8 71 440
74875: 89 83 85 4 57 94
6528: 6 8 8 17
376636: 7 9 301 12 636
33983238: 77 8 38 925 422 51
9773991: 76 738 2 998 6
13324553022657: 7 4 20 5 9 5 30 22 646 9
99691578: 5 71 1 9 4 7 325 7 1 54 7
15561636: 4 3 74 7 10 9 7 6 6 3 3 1
133680: 1 59 7 1 24 5
768797: 956 3 8 375 7
2192068: 4 4 7 2 7 22 7 2 9 97 76
141515823: 4 8 51 515 449 3
102779637: 902 41 6 251 3 920
255504: 7 843 1 68 3
6334426: 8 4 42 47 132 3 439 6
1679200: 6 2 1 28 7 954 4 1 2 4 5
743869: 686 85 6 56 893
1740659638: 723 68 4 5 38 4 37 65 3
38740803516: 696 4 198 64 36 439
1445311524: 851 1 51 9 4 197 4 4 4
82489: 6 13 27 26 153 22
288151123: 5 8 95 3 4 121 6 7 5 7 7 8
33615: 41 9 2 83 249
235334584: 616 5 9 2 473 7 8
18983872: 3 58 389 84 8
966410: 117 12 622 477 3 5
31850527: 318 32 17 741 787
7766: 8 97 6
3767400: 6 4 3 9 203 2 17 7 4 30
8170454: 494 93 449 31 1
56113624133: 5 4 7 6 502 7 9 71 7 35 3
1070749: 2 60 64 3 986 4 6 4 9 1
152169288123: 3 440 2 47 3 834 878 3
23710639960: 7 7 6 2 3 4 2 395 81 2 4 4
41133: 1 1 736 6 119 3 85 2 3 3
2438060548: 872 65 66 8 16 5 308
2150: 60 975 6 34 2
42667317: 8 9 2 848 6 2 7 693
99291: 8 52 97 811 115 69
700480533: 152 24 4 995 533
2043415727134: 437 668 53 7 6 6 5 13 4
47685378032: 2 7 4 4 2 87 82 5 962 32
1623679122582: 842 679 71 4 2 58 2
13176069: 5 5 527 988 81
402209662: 4 891 26 8 4 9 38 389
62080: 86 718 329
1056230: 475 2 5 2 553
95017: 8 6 9 5 8 13 323 7 6 1 5 7
130085288174: 9 9 2 9 674 36 4 2 17 4
179095515: 2 38 6 7 6 26 9 36 8 27
520128: 9 66 438 504
110760: 3 8 4 7 4 60 71
76246863: 2 80 3 3 5 75 7 761 791
2167131616: 590 79 3 197 236 19 1
243936484: 25 10 5 8 8 857 4
88760: 305 4 30 6 2 9 1 70
6539567445: 2 673 89 206 49 53 5
802: 89 4 8 2 1 56
198163: 55 9 8 5 5 514 273
184378: 38 691 7 11 561
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1660075: 217 34 83 710 8 7 38 1
104704026560: 2 8 7 4 6 5 9 429 5 20 7 4
3362348024: 7 4 601 27 3 897 5 7
967272990: 17 30 354 9 559 9 64
695308: 69 436 8 86 854
617664: 4 19 879 684 696
280208148: 365 766 618 143 4
11358272: 74 3 5 44 43 11 29 63 2
102: 25 2 8 67 1
148752720571: 5 693 265 6 10 9 19 3 1
9326675237: 4 658 325 28 56 774 5
63112912358: 63 11 29 123 6 1
689052595: 202 96 7 7 485
6261: 8 4 31 16 93 8 13
1143244033: 857 230 95 9 29 2 1
4077224042: 5 343 675 763 17
148967182: 91 464 855 38 91
13013: 261 7 9 23 7
151402: 2 7 65 119 8 8 484 2 2
1162841: 4 653 7 444 5
122954: 931 42 59 1 119 25
8802293760: 8 6 5 2 7 248 208 5 72 6
882283627: 2 60 762 28 29 68 659
119320851948: 4 6 9 3 2 736 8 3 5 65 8 6
363560: 599 2 9 551 61
79156980000: 12 75 3 35 8 5 487 43
2016471: 8 80 2 5 9 9 1 5 7 66 90
541898: 7 906 63 68 6
8691: 44 4 41 2 4
57859465: 582 9 60 978 6 5 974
969507840: 8 5 3 520 71 4 254 7 3 1
111331: 14 9 2 8 4 3 1 40 188 3
79296: 9 72 2 52 62 4 2 48 7
99752561604: 25 783 42 2 4 32 2 482
260196: 85 8 466 6 2 104 53 9
54308747928: 84 978 7 115 1 6 958
177610113: 5 12 4 679 5 23 457 9
291015504: 409 342 4 702 138
111029044: 7 658 506 16 57 7 844
4431074491353: 263 96 287 7 27 650
61459200: 3 3 3 37 4 805 2 30 80 9
4938: 2 6 7 7 7 586 74 4 130 6
724927: 1 687 9 1 13 80 47
176219199: 8 533 928 1 351
7061236841: 52 30 20 299 859
1680930: 56 9 2 120 1 799 8 2 95
22230091458: 5 780 57 91 4 61
618962: 618 8 7 9 1
979087974: 896 52 407 2 5 53 393
1076124: 3 42 7 761 124
39804061: 3 6 7 9 3 2 3 685 535 6 1
617371560: 9 2 6 77 1 83 4 26 9 10 1
59292627728: 244 243 62 77 28
60679755965: 81 7 1 3 19 57 687 65
385718461: 2 6 873 908 8 3 3 3 2 24
70068614: 5 2 19 383 178 887 7 7
81627: 812 1 8 236 87 45 41
61252920: 7 396 200 229 90
122349515906: 536 4 1 3 95 66 704 49
236503863: 546 954 305 373 131
3351192: 2 65 1 640 75 9 78
5108625: 3 2 2 5 2 165 313 1 7 8 6
178031530140: 14 4 9 269 7 1 710 822
6883328: 6 94 1 3 113 7 9 4 1 4 4
4007370310: 15 90 8 9 7 357 89 830
588964251601: 7 5 347 2 47 20 963 5 1
270755048: 6 42 1 631 212 57 8 8
1332121: 8 9 8 4 2 3 6 800 8 3 3 88
5591335: 371 3 5 2 6 7 5
14219565360: 5 993 213 3 8 754 91 5
5861562162: 1 8 9 4 8 6 6 4 451 53 6 2
1433385: 874 74 21 72 9
15707744640: 568 36 6 5 59 434
1690128: 66 2 4 97 33
398948632: 65 4 61 85 5 3 7 72
10387019376: 63 1 245 7 6 77 42 328
4179604: 5 6 422 1 20 40 45 4
207295515460: 7 423 3 645 7 3 9 6 1 1 9
1496054: 80 69 48 12 54
117174039: 60 5 5 4 331 59 2 37
120561: 443 34 8 3 62
1093662: 1 413 9 1 86
72832203: 49 3 4 4 791 3 5 22 3 9 9
9172450: 520 94 7 264 49 175
5092: 9 52 9 6 5 869
205017: 859 5 67 47 3
502964: 5 465 2 92
982872: 55 31 30 94 721 1 6
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

168
2024/go/day08/day08.go Normal file
View File

@@ -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
}

View File

@@ -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)
}

50
2024/go/day08/input.txt Normal file
View File

@@ -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....

117
2024/go/day09/day09.go Normal file
View File

@@ -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")
}

View File

@@ -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)
}

1
2024/go/day09/input.txt Normal file

File diff suppressed because one or more lines are too long

View File

@@ -7,6 +7,6 @@ require golang.org/x/exp v0.0.0-20221208152030-732eee02a75a
require ( require (
github.com/davecgh/go-spew v1.1.1 // indirect github.com/davecgh/go-spew v1.1.1 // indirect
github.com/pmezard/go-difflib v1.0.0 // indirect github.com/pmezard/go-difflib v1.0.0 // indirect
github.com/stretchr/testify v1.10.0 // indirect github.com/stretchr/testify v1.10.0 // direct
gopkg.in/yaml.v3 v3.0.1 // indirect gopkg.in/yaml.v3 v3.0.1 // indirect
) )

View File

@@ -11,7 +11,10 @@ import (
"adventofcode2024/day02" "adventofcode2024/day02"
"adventofcode2024/day03" "adventofcode2024/day03"
"adventofcode2024/day04" "adventofcode2024/day04"
"adventofcode2024/day05"
"adventofcode2024/day06"
"adventofcode2024/day07"
"adventofcode2024/day08"
) )
// Usage: go run main.go <NN> // Usage: go run main.go <NN>
// assumes input is in day<NN>/input.txt // assumes input is in day<NN>/input.txt
@@ -32,6 +35,19 @@ func main() {
case 4: case 4:
fmt.Printf("part 1: %d\n", day04.Part1(utils.Readfile(d))) fmt.Printf("part 1: %d\n", day04.Part1(utils.Readfile(d)))
fmt.Printf("part 2: %d\n", day04.Part2(utils.Readfile(d))) fmt.Printf("part 2: %d\n", day04.Part2(utils.Readfile(d)))
case 5:
fmt.Printf("part 1: %d\n", day05.Part1(utils.Readfile(d)))
fmt.Printf("part 2: %d\n", day05.Part2(utils.Readfile(d)))
case 6:
fmt.Printf("part 1: %d\n", day06.Part1(utils.Readfile(d)))
fmt.Printf("part 2: %d\n", day06.Part2(utils.Readfile(d)))
case 7:
fmt.Printf("part 1: %d\n", day07.Part1(utils.Readfile(d)))
fmt.Printf("part 2: %d\n", day07.Part2(utils.Readfile(d)))
case 8:
fmt.Printf("part 1: %d\n", day08.Part1(utils.Readfile(d)))
fmt.Printf("part 2: %d\n", day08.Part2(utils.Readfile(d)))
default: default:
panic(fmt.Errorf("no such day: %d", d)) panic(fmt.Errorf("no such day: %d", d))
} }
@@ -39,7 +55,7 @@ func main() {
// Reads day from os.Args. // Reads day from os.Args.
func day() int { func day() int {
latest := 3 latest := 7
if len(os.Args) == 1 { if len(os.Args) == 1 {
return latest return latest
} }