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Add solution for the 4th day of AoC

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This commit is contained in:
Ivan R. 2024-01-10 12:29:05 +05:00
parent d713d2b776
commit bca39663e2
Signed by: lumin
GPG key ID: 927D3132247BDE4E
5 changed files with 317 additions and 0 deletions
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13
advent-of-code-2023/src/main/kotlin/MyMath.kt Normal file
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/**
* I haven't found a function to raise an integer to a power.
* You should not use powers less than 0 :)
*/
fun intPow(base: Int, exponent: Int): Int {
var result = 1
for (i in 1..exponent) {
result *= base
}
return result
}

74
advent-of-code-2023/src/main/kotlin/Solution04.kt Normal file
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class Solution04 {
/** Part 1. */
fun getPointCount(lines: List<String>): Int {
val cards = parseCards(lines)
return cards
.map{it.getPoints()}
.reduce{acc, points -> acc + points}
}
/** Part 2. */
fun getCardCount(lines: List<String>): Int {
val cards = parseCards(lines)
for ((idx, card) in cards.withIndex()) {
// This is the last card.
if (idx == cards.size - 1) break
val matchingNumberCount = card.getMatchingNumberCount()
if (matchingNumberCount == 0) continue
for (i in idx+1..idx+matchingNumberCount) {
if (i >= cards.size) break
cards[i].instances += card.instances
}
}
return cards
.map{it.instances}
.reduce{acc, instances -> acc + instances}
}
private fun parseCards(lines: List<String>): MutableList<Card> {
val cards: MutableList<Card> = mutableListOf()
for (line in lines) {
val (_, numbers) = line.split(": ")
if (numbers.isEmpty()) continue
val (winningNumbers, selectedNumbers) = numbers.split(" | ")
cards.add(Card(
strToInts(winningNumbers),
strToInts(selectedNumbers),
))
}
return cards
}
private fun strToInts(s: String): MutableList<Int> {
return s
.split(" ")
.filter{it.isNotEmpty()}
.map{it.toInt()}
.toMutableList()
}
}
data class Card(
val winningNumbers: MutableList<Int> = mutableListOf(),
val selectedNumbers: MutableList<Int> = mutableListOf(),
/** Used only in part 2. */
var instances: Int = 1,
) {
fun getMatchingNumberCount(): Int {
return selectedNumbers
.filter{winningNumbers.contains(it)}
.size
}
fun getPoints(): Int {
val count = getMatchingNumberCount()
return if (count == 0) 0 else intPow(2, count-1)
}
}

192
advent-of-code-2023/src/main/resources/day-04/input.txt Normal file
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Card 1: 26 36 90 2 75 32 3 21 59 18 | 47 97 83 82 43 7 61 73 57 2 67 31 69 11 44 38 23 52 10 21 45 36 86 49 14
Card 2: 45 10 54 17 15 38 59 96 25 32 | 17 12 77 87 29 70 38 96 15 54 86 64 32 10 28 59 24 45 65 81 42 25 98 14 60
Card 3: 37 31 21 71 80 76 91 77 64 69 | 90 71 91 13 2 40 83 22 45 31 69 53 77 27 97 35 4 55 14 9 52 21 16 19 63
Card 4: 16 82 44 42 51 11 86 14 92 47 | 44 61 81 88 15 11 76 42 17 98 48 83 14 92 99 16 82 86 56 47 10 66 13 22 51
Card 5: 83 84 64 81 97 88 96 59 92 25 | 52 65 98 86 75 48 96 60 56 33 76 81 29 44 97 82 59 64 88 25 23 92 37 84 83
Card 6: 50 51 91 86 25 44 75 23 5 56 | 86 17 56 16 91 75 27 94 39 80 25 71 23 26 12 31 43 45 5 18 50 44 96 51 57
Card 7: 34 14 63 33 87 92 69 67 24 13 | 86 47 31 45 3 32 81 96 21 93 80 25 90 63 79 6 49 91 7 95 62 66 19 24 76
Card 8: 19 67 63 77 62 92 51 49 52 1 | 35 1 94 87 11 82 12 84 49 28 39 96 92 23 34 4 56 5 63 13 77 47 14 9 78
Card 9: 54 14 61 36 10 35 92 34 47 95 | 87 92 95 54 3 47 15 36 90 11 9 84 10 75 45 72 61 88 14 64 35 34 98 46 76
Card 10: 27 59 55 95 4 99 8 48 97 6 | 51 50 48 91 34 4 97 86 27 99 20 95 17 6 80 43 21 60 28 10 89 59 73 55 8
Card 11: 74 46 96 17 62 65 38 4 29 6 | 48 83 42 4 17 35 1 38 6 74 40 95 80 49 46 29 65 62 85 47 96 18 76 36 68
Card 12: 68 12 22 46 33 57 61 86 13 62 | 62 35 20 7 16 78 60 11 9 31 46 34 73 68 77 36 61 66 65 14 26 83 98 95 69
Card 13: 50 14 10 3 83 27 52 84 61 44 | 75 22 56 60 62 36 87 33 85 52 7 95 19 81 10 47 20 73 50 13 46 3 83 37 84
Card 14: 51 42 40 21 29 78 10 31 54 24 | 78 67 10 17 54 99 1 87 8 66 23 56 5 63 92 50 71 47 98 3 73 16 74 42 85
Card 15: 65 68 76 6 40 78 11 60 55 84 | 39 40 59 43 55 69 72 14 94 66 20 80 11 93 64 68 96 34 38 84 67 41 53 89 88
Card 16: 77 95 61 17 74 46 54 3 37 81 | 3 14 41 73 12 75 31 71 24 26 92 74 64 98 89 95 93 19 15 82 91 30 66 81 40
Card 17: 87 11 32 58 43 99 7 79 37 82 | 70 14 67 68 18 29 54 12 15 17 34 71 84 74 4 36 98 42 24 23 38 97 79 81 83
Card 18: 2 70 93 86 50 39 15 76 64 8 | 76 42 75 67 14 39 15 64 45 10 56 12 32 2 93 52 8 68 97 36 79 98 17 37 59
Card 19: 55 53 86 35 88 48 79 56 34 33 | 77 89 45 76 82 23 52 97 62 27 7 38 84 81 99 41 40 70 42 50 21 4 80 12 46
Card 20: 53 21 29 48 42 89 12 34 76 14 | 56 46 69 50 88 85 74 40 66 47 79 77 61 9 67 39 22 63 6 59 54 92 14 51 96
Card 21: 11 87 63 43 5 91 22 45 61 26 | 46 99 43 57 88 75 32 34 91 7 87 15 13 54 66 82 1 10 31 70 24 16 2 90 39
Card 22: 31 89 65 74 38 4 99 40 19 9 | 45 28 54 77 3 42 14 55 41 71 81 84 82 69 64 97 76 48 56 13 23 66 15 30 8
Card 23: 6 59 76 99 9 86 4 84 5 27 | 37 80 51 24 46 72 68 82 89 30 21 55 96 7 91 85 92 93 78 14 70 61 2 11 50
Card 24: 11 37 40 53 70 95 44 3 92 49 | 60 67 54 52 34 93 87 26 74 88 4 91 78 68 17 38 97 7 43 69 64 18 73 15 80
Card 25: 35 52 84 65 30 2 37 89 67 90 | 51 14 25 96 45 4 28 88 8 22 13 66 9 48 82 85 86 54 75 91 1 10 29 5 39
Card 26: 88 84 2 68 47 81 8 11 46 29 | 47 84 98 20 75 63 44 64 15 7 27 53 43 26 68 73 2 91 78 29 46 11 76 8 99
Card 27: 65 94 27 71 54 86 77 47 64 31 | 65 8 27 76 83 64 69 96 78 61 7 11 72 55 41 10 54 93 15 52 90 4 33 94 82
Card 28: 46 89 43 92 93 60 14 34 91 69 | 60 94 46 43 82 53 91 34 92 15 28 55 6 88 57 89 14 67 4 61 36 69 2 93 12
Card 29: 73 54 41 45 29 83 65 70 80 72 | 42 59 6 73 36 87 23 14 47 96 77 72 43 29 70 93 90 50 65 68 56 19 17 63 76
Card 30: 73 18 66 4 96 55 52 59 93 97 | 36 50 90 22 78 96 71 60 87 26 84 74 66 68 55 54 63 73 20 97 10 12 16 76 93
Card 31: 58 42 91 76 86 26 80 5 14 79 | 1 40 4 42 11 13 68 99 10 97 59 76 56 67 5 91 93 26 38 87 80 17 86 33 12
Card 32: 65 29 20 80 13 60 43 18 17 95 | 55 53 72 8 22 45 90 79 81 10 77 5 26 87 52 56 43 30 54 98 93 14 62 74 51
Card 33: 40 81 10 65 18 59 1 68 69 35 | 65 91 69 35 59 48 23 37 33 10 29 11 76 25 55 64 58 9 46 47 83 51 98 68 1
Card 34: 9 87 17 41 81 51 50 20 5 14 | 54 19 81 60 48 90 70 43 44 62 78 3 9 6 87 51 4 47 77 30 82 76 56 13 94
Card 35: 58 71 47 3 59 96 92 30 74 4 | 9 78 30 51 43 82 96 35 48 76 53 52 62 49 4 41 39 93 27 80 87 59 33 34 7
Card 36: 8 45 92 39 66 36 34 69 82 63 | 67 37 24 19 85 46 47 92 74 3 17 97 61 65 83 39 77 34 15 55 75 7 20 28 54
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Card 52: 14 34 90 39 44 26 95 17 19 20 | 80 78 93 16 67 15 68 36 98 1 35 45 10 86 65 61 47 26 82 9 69 83 81 23 48
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Card 60: 75 7 58 65 17 14 50 8 69 20 | 96 25 69 20 75 50 7 8 64 31 14 17 24 65 93 19 40 62 53 90 34 58 74 85 51
Card 61: 40 93 9 39 71 44 36 80 87 90 | 87 27 25 39 26 36 97 82 79 93 44 15 31 20 2 61 90 55 40 74 1 80 7 95 49
Card 62: 78 91 53 31 29 93 98 99 46 43 | 59 53 28 70 31 37 99 1 82 46 44 60 17 61 43 29 98 93 91 8 42 6 78 32 23
Card 63: 36 20 89 67 86 17 50 29 49 12 | 43 99 83 28 29 94 50 76 82 51 40 47 97 30 20 78 49 72 6 57 46 67 75 68 86
Card 64: 69 24 34 10 2 14 86 38 76 5 | 70 38 34 99 64 10 75 82 58 72 5 2 83 76 9 15 42 81 86 24 59 74 18 69 14
Card 65: 33 69 2 45 25 40 35 48 83 53 | 64 40 33 48 63 96 2 22 53 97 43 69 83 79 20 5 35 9 25 29 74 47 72 99 45
Card 66: 93 1 92 57 71 23 85 51 13 88 | 10 27 92 6 65 28 33 67 53 58 38 13 40 69 90 97 24 50 36 85 54 91 94 30 21
Card 67: 82 25 87 96 97 55 35 90 68 93 | 40 74 21 45 59 82 16 67 79 36 32 28 12 73 81 60 84 54 77 29 7 58 86 34 3
Card 68: 13 22 75 87 19 67 29 51 80 17 | 91 87 16 98 52 24 43 34 19 80 23 21 99 44 27 13 60 42 17 79 67 14 1 31 3
Card 69: 50 35 32 17 92 40 88 41 91 77 | 71 17 41 23 26 5 92 29 55 91 40 83 88 65 51 9 50 53 77 46 54 35 62 32 52
Card 70: 56 61 5 90 8 15 6 46 10 98 | 10 55 82 56 30 72 78 13 91 95 49 6 93 27 74 85 64 62 70 8 9 54 57 45 90
Card 71: 76 2 26 66 56 41 72 70 61 94 | 88 32 97 68 83 37 76 41 36 86 3 84 44 9 24 69 5 95 7 50 35 1 27 77 46
Card 72: 82 38 71 98 60 55 29 73 4 1 | 83 92 69 85 64 97 35 33 20 87 81 71 57 75 66 82 29 19 63 36 23 58 60 93 72
Card 73: 74 70 33 43 58 5 47 18 98 59 | 77 81 75 64 69 92 20 2 1 28 40 32 7 12 57 31 68 36 45 46 61 97 39 66 63
Card 74: 85 6 64 88 46 86 4 25 12 17 | 11 49 38 40 36 46 23 62 84 48 12 60 76 75 9 10 90 35 26 37 69 89 4 17 43
Card 75: 71 52 55 35 87 86 60 27 32 89 | 35 30 73 10 89 98 4 69 22 9 23 17 71 53 87 83 48 86 74 40 21 62 63 85 50
Card 76: 75 66 33 41 3 25 99 98 37 91 | 35 38 12 11 46 40 20 15 94 61 47 79 10 83 24 50 51 2 48 26 63 13 72 4 88
Card 77: 78 8 62 30 92 18 76 36 84 91 | 4 26 82 15 92 94 13 48 33 49 46 60 74 58 81 67 10 2 9 23 70 6 57 53 79
Card 78: 56 55 32 44 13 84 95 85 20 92 | 7 17 87 86 16 60 70 65 74 12 4 18 95 8 19 54 15 6 94 84 82 58 59 28 99
Card 79: 16 14 42 27 10 49 89 65 91 76 | 68 70 1 61 81 71 32 40 51 41 36 31 45 33 18 94 17 2 60 76 74 6 62 79 11
Card 80: 56 78 20 15 58 30 49 75 79 66 | 12 52 96 14 80 34 61 7 40 9 17 47 97 6 2 93 39 3 76 42 43 71 33 67 54
Card 81: 75 44 15 74 17 25 51 28 96 67 | 45 69 89 75 8 67 71 70 46 40 15 96 87 20 28 17 21 42 85 68 44 18 74 59 51
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Card 83: 87 21 17 14 49 92 19 1 77 36 | 67 36 31 74 87 13 1 21 35 97 99 52 19 92 9 77 51 49 89 72 14 26 56 17 90
Card 84: 2 60 7 46 57 31 68 83 25 5 | 42 72 20 38 88 35 73 98 92 89 41 90 65 81 96 21 50 62 87 36 43 33 8 66 55
Card 85: 38 43 61 78 57 48 82 80 3 26 | 25 17 61 94 50 69 5 26 39 85 76 58 80 8 33 11 55 38 79 60 82 93 84 20 86
Card 86: 17 36 14 77 98 99 33 38 34 4 | 17 97 98 30 38 65 16 43 28 85 77 36 83 88 29 18 60 26 14 33 80 78 99 34 4
Card 87: 42 52 68 76 78 48 36 50 65 44 | 21 23 42 68 13 43 63 36 33 67 8 66 70 90 48 1 65 50 34 7 69 82 76 78 44
Card 88: 68 67 15 30 92 38 96 63 75 44 | 59 30 83 6 48 42 35 28 46 34 92 44 49 78 43 27 47 75 15 33 62 37 3 68 60
Card 89: 12 46 88 26 86 43 52 83 29 92 | 4 29 60 78 25 43 15 74 73 99 83 86 59 27 96 44 38 48 6 37 52 85 42 41 46
Card 90: 95 71 59 29 13 83 90 57 7 94 | 71 19 43 13 68 84 51 29 16 31 45 94 57 92 7 90 20 55 98 36 64 83 59 10 95
Card 91: 16 74 55 79 95 25 84 61 67 14 | 67 44 80 79 62 81 25 84 61 35 72 78 10 93 14 95 16 45 85 66 74 47 8 29 53
Card 92: 41 74 92 35 88 76 9 79 71 53 | 51 88 44 71 81 49 36 97 35 46 33 62 18 9 85 98 79 76 53 47 41 89 92 63 94
Card 93: 71 11 27 69 65 21 23 25 40 81 | 90 96 34 21 11 55 20 76 44 49 60 75 71 98 27 40 58 63 43 81 18 59 33 88 47
Card 94: 4 39 9 70 63 75 14 99 29 25 | 99 77 91 19 30 94 25 26 1 80 73 32 48 10 61 4 7 31 75 39 70 36 63 51 57
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Card 175: 87 10 42 65 40 51 31 45 48 89 | 75 37 60 71 76 92 10 29 14 63 81 34 94 88 32 91 6 82 79 90 53 89 68 49 26
Card 176: 96 83 15 50 17 16 81 85 11 35 | 31 17 8 30 33 47 11 15 41 73 99 40 70 48 91 26 96 60 39 95 52 59 45 23 50
Card 177: 64 51 20 97 68 69 57 58 34 12 | 54 82 32 79 89 70 47 52 16 36 83 10 49 8 18 94 73 77 48 42 19 98 55 75 80
Card 178: 36 1 53 62 73 77 52 59 51 3 | 59 35 68 1 45 77 4 79 83 16 36 63 99 53 52 3 73 51 13 89 84 32 64 33 62
Card 179: 30 70 61 7 29 52 97 81 65 59 | 48 5 42 71 88 89 93 64 37 28 26 25 90 94 92 21 50 6 19 33 68 66 78 1 15
Card 180: 66 3 33 16 57 41 91 83 48 68 | 58 68 33 80 42 13 69 78 16 83 18 41 34 35 79 48 66 62 86 90 2 6 96 57 91
Card 181: 86 94 43 29 75 78 42 95 13 10 | 42 88 43 13 60 52 47 86 87 59 95 72 8 23 82 2 69 61 14 71 94 90 30 85 51
Card 182: 73 90 84 14 52 15 98 43 3 23 | 84 8 11 64 83 62 77 18 53 81 19 47 1 79 99 41 40 74 93 89 20 72 49 26 38
Card 183: 24 78 51 40 92 66 77 39 97 68 | 38 70 63 5 19 21 95 73 64 14 55 80 23 22 77 65 74 97 37 26 82 83 9 52 60
Card 184: 98 12 62 53 69 27 84 64 91 94 | 19 9 90 98 43 26 7 12 68 16 10 45 20 23 4 63 3 38 77 6 27 8 91 70 60
Card 185: 32 37 2 76 75 62 39 33 12 13 | 11 29 49 77 50 97 65 87 25 91 10 21 15 82 95 99 80 71 54 42 48 78 72 63 34
Card 186: 55 49 21 41 83 40 29 51 54 57 | 20 88 52 62 85 90 25 45 54 58 72 91 98 14 13 28 74 92 31 8 42 3 26 11 59
Card 187: 95 43 56 46 98 96 55 31 28 50 | 23 5 13 35 95 37 1 89 76 45 68 73 52 15 26 3 38 36 99 51 80 8 63 77 28
Card 188: 84 71 30 79 6 13 57 3 63 55 | 46 45 43 26 48 47 37 35 88 13 59 9 95 86 49 98 64 62 54 44 22 92 25 3 15
Card 189: 56 94 93 30 27 53 85 58 4 91 | 86 70 1 96 60 92 66 33 9 50 78 41 67 55 7 28 89 31 14 19 76 42 71 82 63
Card 190: 17 27 42 70 11 38 47 58 92 88 | 73 15 86 13 25 64 58 4 61 95 36 41 94 17 72 90 22 6 56 98 35 45 60 19 33
Card 191: 19 96 44 57 88 39 7 67 85 89 | 49 31 15 98 77 14 43 59 85 2 79 71 69 81 95 93 33 66 25 87 65 13 62 46 91
Card 192: 29 77 54 66 79 7 88 72 99 35 | 50 94 48 18 60 56 74 59 97 5 87 8 70 93 81 27 14 57 25 22 71 63 83 44 15

6
advent-of-code-2023/src/main/resources/day-04/test.txt Normal file
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@ -0,0 +1,6 @@
Card 1: 41 48 83 86 17 | 83 86 6 31 17 9 48 53
Card 2: 13 32 20 16 61 | 61 30 68 82 17 32 24 19
Card 3: 1 21 53 59 44 | 69 82 63 72 16 21 14 1
Card 4: 41 92 73 84 69 | 59 84 76 51 58 5 54 83
Card 5: 87 83 26 28 32 | 88 30 70 12 93 22 82 36
Card 6: 31 18 13 56 72 | 74 77 10 23 35 67 36 11

32
advent-of-code-2023/src/test/kotlin/Solution04Test.kt Normal file
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import kotlin.test.Test
import kotlin.test.assertEquals
class Solution04Test {
@Test
fun testGetPointCount() {
val text = ResourceReader().readFile("day-04/test.txt")
val res = Solution04().getPointCount(text)
assertEquals(13, res)
}
@Test
fun solvePart1() {
val text = ResourceReader().readFile("day-04/input.txt")
val res = Solution04().getPointCount(text)
println(res)
}
@Test
fun testGetCardCount() {
val text = ResourceReader().readFile("day-04/test.txt")
val res = Solution04().getCardCount(text)
assertEquals(30, res)
}
@Test
fun solvePart2() {
val text = ResourceReader().readFile("day-04/input.txt")
val res = Solution04().getCardCount(text)
println(res)
}
}