day07

2023/go/day07/day07.go

@@ -0,0 +1,291 @@
+package day07
+
+import (
+	_ "fmt"
+	"strings"
+	"sort"
+	"adventofcode2023/utils"
+
+)
+type Card int
+
+const (
+	_ Card = 1 + iota
+    Two
+    Three 
+    Four
+	Five
+	Six
+	Seven
+	Eight
+	Nine
+	Ten 
+	Jack
+	Queen
+	King
+	Ace
+)
+
+type Card2 int
+const (
+	_ Card2 = iota
+	Joker
+    Two2
+    Three2 
+    Four2
+	Five2
+	Six2
+	Seven2
+	Eight2
+	Nine2
+	Ten2 
+	Queen2
+	King2
+	Ace2
+)
+
+type HandType int
+
+const (
+	_ HandType = iota
+	HighCard
+	OnePair
+	TwoPair
+	ThreeKind
+	FullHouse
+	FourKind
+	FiveKind
+)
+
+type Hand struct {
+	cards [5]Card
+	bid int
+	rank int
+	handType HandType
+}
+
+type Hand2 struct {
+	cards [5]Card2
+	bid int
+	rank int
+	handType HandType
+}
+
+func Part1(input string) int {
+	total := 0
+	hands := parseInput(1, input)
+	sort.Slice(hands, func(i, j int) bool {
+		if hands[i].handType == hands[j].handType {
+			for k:=0;k<5;k++{
+				if hands[i].cards[k] == hands[j].cards[k] {
+					continue
+				}
+				return hands[i].cards[k] < hands[j].cards[k]
+			}
+		} 
+		return hands[i].handType < hands[j].handType
+	})
+	for i,hand := range hands {
+		total += (i+1) * hand.bid
+	}
+	return total
+}
+
+func Part2(input string) int {
+	total := 0
+	hands := parseInput(2, input)
+	sort.Slice(hands, func(i, j int) bool {
+		if hands[i].handType == hands[j].handType {
+			for k:=0;k<5;k++{
+				if hands[i].cards[k] == hands[j].cards[k] {
+					continue
+				}
+				if hands[i].cards[k] == Jack {return true}
+				if hands[j].cards[k] == Jack {return false}
+				return hands[i].cards[k] < hands[j].cards[k]
+			}
+		} 
+		return hands[i].handType < hands[j].handType
+	})
+	for i,hand := range hands {
+		total += (i+1) * hand.bid
+	}
+	return total
+}
+
+func parseInput(part int, input string) ([]Hand) {
+	var hand Hand
+	var hands []Hand
+	lines := strings.Split(input, "\n")
+	for _, line := range lines {
+		tokens := strings.Fields(line)
+		hand.bid = utils.MustAtoi(tokens[1])
+		for i, j := range tokens[0] {
+				hand.cards[i]	= toCard(j)
+		}
+		hand.handType = toHandType(part, hand.cards)
+		hands = append(hands, hand)
+	}
+	return hands
+}
+
+func toCard(j rune) Card {
+	switch j {
+	case '2':
+		return Two
+	case '3':
+		return Three
+	case '4':
+		return Four
+	case '5':
+		return Five
+	case '6':
+		return Six
+	case '7':
+		return Seven
+	case '8':
+		return Eight
+	case '9':
+		return Nine
+	case 'T':
+		return Ten
+	case 'J':
+		return Jack
+	case 'Q':
+		return Queen
+	case 'K':
+		return King
+	case 'A':
+		return Ace
+	}
+	return -1
+}
+
+func toHandType(part int, cards [5]Card) HandType {
+	jokers := 0
+	handType := HighCard
+	cardMap := make(map[Card]int)
+	for _, card := range cards {
+		if part == 2 && card == Jack {
+			jokers++
+		} else {
+			if _, ok := cardMap[card]; ok {
+				cardMap[card]++
+			} else {
+				cardMap[card] = 1
+			}
+		}
+	}
+	cardSorted := ToSortedSlice(cardMap)
+	if part == 2 && jokers == 5 { return FiveKind}
+	if part == 2 && jokers > 0 {
+		cardSorted[0].Value = cardSorted[0].Value + jokers
+	}
+	if cardSorted[0].Value == 5 { handType = FiveKind}
+	if cardSorted[0].Value == 4 { handType = FourKind}
+	if cardSorted[0].Value == 3 {
+		if cardSorted[1].Value == 2 {handType = FullHouse}
+		if cardSorted[1].Value == 1 {handType = ThreeKind}
+	}
+	if cardSorted[0].Value == 2 {
+		if cardSorted[1].Value == 2 {handType = TwoPair}
+		if cardSorted[1].Value == 1 {handType = OnePair}	
+	}
+	return handType
+}
+
+//func toHandType(part int, cards [5]Card) HandType {
+//	cardMap := make(map[Card]int)
+//	for _, card := range cards {
+//		if _, ok := cardMap[card]; ok {
+//			cardMap[card]++
+//		} else {
+//			cardMap[card] = 1
+//		}
+//	}
+//	if part == 2 {
+//		switch cardMap[Jack] {
+//		case 5:
+//			return FiveKind
+//		case 4:
+//			return FiveKind
+//		case 3:
+//			if len(cardMap) == 2 {return FiveKind}
+//			return FourKind
+//		case 2:
+//			switch len(cardMap) {
+//			case 2:
+//				return FiveKind
+//			case 3:
+//				return FourKind
+//			case 4:
+//				return ThreeKind
+//
+//			}
+//		case 1:
+//			switch len(cardMap) {
+//			case 2:
+//				return FiveKind
+//			case 3:
+//				max := utils.MapFindMax(cardMap)
+//				if max == 3 {return FourKind}
+//				if max == 2 {return FullHouse}
+//			case 4:
+//				return ThreeKind
+//			case 5:
+//				return OnePair
+//
+//			}			
+//		}
+//	}
+//	switch len(cardMap) {
+//	case 5:
+//		return HighCard
+//	case 4:
+//		return OnePair
+//	case 3:
+//		for _, count := range cardMap {
+//			if count == 3 {
+//				return ThreeKind
+//			}
+//		}
+//		return TwoPair
+//	case 2:
+//		for _, count := range cardMap {
+//			if count == 4 {
+//				return FourKind
+//			} 
+//		}
+//		return FullHouse
+//	case 1:
+//		return FiveKind
+//	}
+//	return -1
+//}
+
+// KeyValue is a struct to hold key-value pairs
+type KeyValue struct {
+	Key   Card
+	Value int
+}
+
+func ToSortedSlice(myMap map[Card]int) []KeyValue {
+
+	var keyValuePairs []KeyValue
+	for key, value := range myMap {
+		keyValuePairs = append(keyValuePairs, KeyValue{key, value})
+	}
+
+	// Sort the slice by values
+	sort.Slice(keyValuePairs, func(i, j int) bool {
+		if keyValuePairs[i].Value == keyValuePairs[j].Value { return keyValuePairs[i].Key > keyValuePairs[j].Key }
+		return keyValuePairs[i].Value > keyValuePairs[j].Value
+	})
+
+	// Create a new map with sorted key-value pairs
+	//sortedMap := make(map[Card]int)
+	//for _, kv := range keyValuePairs {
+	//	sortedMap[kv.Key] = kv.Value
+	//}
+	return keyValuePairs
+}

2023/go/day07/day07_test.go

@@ -0,0 +1,33 @@
+package day07
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestPart1(t *testing.T) {
+	r := Part1(
+`32T3K 765
+T55J5 684
+KK677 28
+KTJJT 220
+QQQJA 483`)
+	require.Equal(t, 6440, r)
+}
+
+func TestPart2(t *testing.T) {
+	r := Part2(
+		`32T3K 765
+		T55J5 684
+		KK677 28
+		KTJJT 220
+		QQQJA 483`)
+	require.Equal(t, 5905, r)
+}
+func TestPart21(t *testing.T) {
+	r := Part2(
+		`QQKKJ 765
+		JKKK2 684`)
+	require.Equal(t, 5905, r)
+}

2023/go/main.go

@@ -13,6 +13,7 @@ import (
 	"adventofcode2023/day04"
 	"adventofcode2023/day05"
 	"adventofcode2023/day06"
+	"adventofcode2023/day07"
 )
 // Usage: go run main.go <NN>
 // assumes input is in day<NN>/input.txt
@@ -39,6 +40,9 @@ func main() {
 	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)))
 	default:
 		panic(fmt.Errorf("no such day: %d", d))
 	}
@@ -46,7 +50,7 @@ func main() {
 
 // Reads day from os.Args.
 func day() int {
-	latest := 5
+	latest := 6
 	if len(os.Args) == 1 {
 		return latest
 	}