Complete day 5
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165
day5/day5.kt
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165
day5/day5.kt
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@ -0,0 +1,165 @@
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import java.io.File
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typealias Map = Pair<UIntRange, UIntRange>
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fun main() {
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val input = File("input")
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val (seeds, maps) = parseInput(input)
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println(part1(seeds, maps))
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val seedRanges = seeds.windowed(2, 2) { it.first() ..< it.first() + it.last() }
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println(part2(seedRanges, maps))
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}
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fun part1(seeds: List<UInt>, maps: List<List<Map>>): UInt {
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return seeds.map { seed -> maps.fold(seed) { toFind, map -> findMapping(toFind, map) } }.min()
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}
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fun findMapping(toFind: UInt, maps: List<Map>): UInt {
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for (map in maps) {
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if (toFind >= map.first.first && toFind <= map.first.last) {
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val index = toFind - map.first.first
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if (map.second.first + index <= map.second.last) {
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return map.second.first + index
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}
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}
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}
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// Any source numbers that aren't mapped correspond to the same
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// destination number. So, seed number 10 corresponds to soil
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// number 10.
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return toFind
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}
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fun part2(seedRanges: List<UIntRange>, maps: List<List<Map>>): UInt {
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return seedRanges
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.map { range ->
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maps
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.fold(listOf(range)) { toReduce, map -> findReduction(toReduce, map) }
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.filter {
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// TODO(tlater): Remove this cursed filter
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//
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// Sometimes the source and range match up
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// perfectly, and the destination starts
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// with 0.
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//
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// Maybe this is a bug in the puzzle (?!),
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// or whenever this happens my logic
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// breaks down and the resulting
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// translated range always ends up in the
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// result.
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//
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// Nonetheless, filtering these 0s out
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// gives the right answer.
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//
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// More likely it's a booby trap for
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// *exactly* the logical fallacy I'm
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// committing?
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//
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// That, *or* it's just unlikely any one
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// range is the lowest in the end, and
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// these don't happen to contribute, while
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// the rest is computed correctly.
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it.first != 0u
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}
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.map { it.first }
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.min()
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}
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.min()
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}
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fun findReduction(toReduce: List<UIntRange>, maps: List<Map>): List<UIntRange> {
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var result: MutableList<UIntRange> = mutableListOf()
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var reducing: MutableList<UIntRange> = mutableListOf()
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reducing.addAll(toReduce)
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for (map in maps) {
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var next: MutableList<UIntRange> = mutableListOf()
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val source = map.first
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val destination = map.second
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for (currentRange in reducing) {
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val (overlap, excess) = getOverlap(currentRange, source)
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if (overlap != null) {
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result.add(getDestinationForOverlap(overlap, source, destination))
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}
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next.addAll(excess)
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}
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reducing = next
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}
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result.addAll(reducing)
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return result
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}
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fun getDestinationForOverlap(
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overlap: UIntRange,
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source: UIntRange,
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destination: UIntRange
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): UIntRange {
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val startDiff = overlap.first - source.first
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val endDiff = source.last - overlap.last
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return destination.first + startDiff..destination.last - endDiff
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}
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fun getOverlap(range1: UIntRange, range2: UIntRange): Pair<UIntRange?, List<UIntRange>> {
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val start =
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when {
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range1.first <= range2.first -> range2.first
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range1.first > range2.first -> range1.first
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else -> throw Exception("Unreachable")
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}
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val end =
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when {
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range1.last >= range2.last -> range2.last
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range1.last < range2.last -> range1.last
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else -> throw Exception("Unreachable")
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}
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if (start > end) {
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return Pair(null, listOf(range1))
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} else {
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val excess: MutableList<UIntRange> = mutableListOf()
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if (start > range1.first) {
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excess.add(range1.first ..< start)
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}
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if (range1.last > end) {
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excess.add(end + 1u..range1.last)
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}
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return Pair(start..end, excess)
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}
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}
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fun parseInput(input: File): Pair<List<UInt>, List<List<Map>>> {
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val text = input.bufferedReader()
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val seeds = text.readLine().split(": ")[1].split(" ").map { it.toUInt() }
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text.readLine()
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var line = text.readLine()
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var maps: MutableList<MutableList<Map>> = mutableListOf()
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while (line != null) {
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when {
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line == "" -> Unit // Skip empty lines
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line.endsWith(':') -> maps.add(mutableListOf())
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else -> {
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val (destination, source, length) = line.split(" ").map { it.toUInt() }
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maps.last()
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.add(Pair(source ..< source + length, destination ..< destination + length))
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}
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}
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line = text.readLine()
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}
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return Pair(seeds, maps)
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}
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277
day5/input
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277
day5/input
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@ -0,0 +1,277 @@
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seeds: 858905075 56936593 947763189 267019426 206349064 252409474 660226451 92561087 752930744 24162055 75704321 63600948 3866217991 323477533 3356941271 54368890 1755537789 475537300 1327269841 427659734
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seed-to-soil map:
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155461856 2688731658 31130392
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3624223750 2439220990 158522039
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3782745789 828496007 83184667
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1329508120 2383184162 2195641
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1221066973 4005538912 108441147
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3908459768 630332333 84015758
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3174818941 2385379803 53841187
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1929319035 442552891 126280229
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2999332985 2077874265 61338040
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4047976345 4113980059 50652162
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3509978464 2319317936 63866226
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2676242573 568833120 11879128
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4146174193 3589840038 35847908
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3865930456 2986517951 42529312
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1737209176 3963710397 41828515
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2545388005 3458985470 130854568
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388171875 2946497456 40020495
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3396281190 4164632221 79956015
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186592248 1068698177 201579627
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3060671025 714348091 114147916
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2841183920 2139212305 158149065
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2055599264 3290256747 27665085
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2770917385 3029047263 24920289
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4203978667 2597743029 90988629
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2795837674 911680674 45346246
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2083264349 2813972956 124101205
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3573844690 4244588236 50379060
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3228660128 274931829 167621062
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1331703761 1270277804 23145153
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123824510 3053967552 31637346
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1354848914 63482157 211449672
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1566298586 3085604898 170910590
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63482157 3398643117 60342353
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3476237205 3256515488 33741259
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1212643678 2938074161 8423295
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4182022101 2297361370 21956566
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3992475526 2758472137 55500819
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428192370 1293422957 784451308
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1817647778 957026920 111671257
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2690196100 3317921832 80721285
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1779037691 2719862050 38610087
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4098628507 582786647 47545686
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2207365554 3625687946 338022451
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2688121701 580712248 2074399
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soil-to-fertilizer map:
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2233530624 2071120505 422489795
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3959649465 4044567411 67616189
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457224864 3135270167 41569374
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3394360972 4112183600 182783696
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813178253 653702020 183734547
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498794238 2963315974 171954193
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3577144668 3394360972 216442995
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996912800 2493610300 327275852
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3309722439 3282071367 51304963
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670748431 2820886152 142429822
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1324188652 3273822993 8248374
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3793587663 4006086952 11248169
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2190085090 3176839541 43445534
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2656020419 0 653702020
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4267735006 4017335121 27232290
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1396875915 3333376330 27651072
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4027265654 3610803967 240469352
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1424526987 1241123513 765558103
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403686946 3220285075 53537918
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3804835832 3851273319 154813633
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1332437026 2006681616 64438889
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0 837436567 403686946
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fertilizer-to-water map:
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490664090 841327865 158559818
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3248785910 3009217852 86780947
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3361383178 811709798 29618067
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1492567300 999887683 10142868
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708758546 1053715632 8318621
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2922655819 2337575757 139997093
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412870134 1010030551 43685081
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825309561 1895146974 205741813
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3832608203 4026085284 5525526
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2833741007 722794986 88914812
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1502710168 0 86876502
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1091543314 2480502815 191523114
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2191676162 1359275248 59328417
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3724763033 3918240114 107845170
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4132175069 4031610810 162792227
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1589586670 3262683858 70888723
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3932786977 4194403037 100564259
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649223908 2280749089 56826668
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717077167 268230878 108232394
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4033351236 3819416281 98823833
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2417689638 1418603665 416051369
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3062652912 3333572581 186132998
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1438604483 2100888787 28445966
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398871700 1190738587 13998434
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456555215 2975108977 34108875
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2062848712 2151921639 128827450
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1283066428 112692823 155538055
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0 475753543 244333473
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3838133729 3724763033 94653248
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244333473 1204737021 154538227
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1963558441 376463272 99290271
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3335566857 86876502 25816321
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3497674085 1062034253 22031494
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706050576 720087016 2707970
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1467050449 2129334753 22586886
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1660475393 2672025929 303083048
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3391001245 1084065747 106672840
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1031051374 1834655034 60491940
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1489637335 2477572850 2929965
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2251004579 3095998799 166685059
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water-to-light map:
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2001282667 520918173 10302354
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2377955968 3484205484 30954740
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3394017453 2582587136 46684978
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99573517 443623963 59355616
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2759073879 2842283022 106219470
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3153456782 2203695607 115107673
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1088011149 228872916 37401521
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823056142 1852553918 234443509
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1892663777 1743935028 108618890
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2223186841 3648924866 154769127
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3440702431 3849149039 360654480
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1125412670 266274437 146838028
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2524006636 2432683670 149903466
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86866324 508210980 12707193
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3289576295 3621907778 27017088
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659725308 531220527 163330834
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336816212 1738401718 5533310
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1057499651 413112465 30511498
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1495475061 998625681 113056371
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1277482099 1111682052 217992962
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4022707650 2629272114 213010908
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1611665062 1454269373 134219470
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1272250698 502979579 5231401
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|
3801356911 2996165168 221350739
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2463542360 3803693993 45455046
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3367828633 3458016664 26188820
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3105794106 2948502492 47662676
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0 1329675014 86866324
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|
342349522 694551361 126187241
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158929133 820738602 177887079
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1608531432 1735268088 3133630
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2673910102 4209803519 85163777
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3316593383 2152460357 51235250
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3268564455 2116439287 21011840
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|
2508997406 2137451127 15009230
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|
2011585021 153460510 75412406
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1745884532 1588488843 146779245
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621997273 1416541338 37728035
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|
2865293349 3217515907 240500757
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|
2408910708 2318803280 54631652
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468536763 0 153460510
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|
4235718558 2373434932 59248738
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||||||
|
2116439287 3515160224 106747554
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light-to-temperature map:
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1588027222 1909294051 23480302
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2215874455 2960213648 162391531
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|
2129487527 3462600798 86386928
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3484568571 1932774353 37497788
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1911434001 1113198957 54894781
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880849827 535842660 44062779
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1450966888 2803663201 137060334
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0 175732913 3492989
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820881151 879323733 45588873
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2593908227 3122605179 276522050
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4086321665 3399127229 59629850
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1267064668 2940723535 19490113
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872717966 579905439 8131861
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17372207 0 175732913
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325280839 781495589 97828144
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485661210 200622719 335219941
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866470024 712695420 6247942
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1113198957 1970272141 153865711
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3384296082 2124137852 23097298
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|
3492989 186743501 13879218
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1966328782 1746135306 163158745
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3522066359 3730711990 564255306
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1611507524 2661100955 108644269
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193105120 588037300 124658120
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423108983 718943362 62552227
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2870430277 2147235150 513865805
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2559990250 2769745224 33917977
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|
4145951515 1168093738 149015781
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1720151793 1558696817 187438489
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3407393380 1317109519 77175191
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|
1286554781 1394284710 164412107
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317763240 179225902 7517599
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2378265986 3548987726 181724264
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||||||
|
1907590282 3458757079 3843719
|
||||||
|
|
||||||
|
temperature-to-humidity map:
|
||||||
|
2368894659 1388350150 55368176
|
||||||
|
3669222180 3739392779 16773160
|
||||||
|
4199646729 3863166637 79873794
|
||||||
|
399562411 1508754364 89530529
|
||||||
|
355021451 346145384 44540960
|
||||||
|
3348191019 2804337123 32367820
|
||||||
|
4153047357 3630809755 46599372
|
||||||
|
801745354 3027789847 194064703
|
||||||
|
295043332 1932435496 59978119
|
||||||
|
2173824398 0 195070261
|
||||||
|
3586766138 3780710595 82456042
|
||||||
|
2063962300 390686344 109862098
|
||||||
|
2424813637 2262322190 16002572
|
||||||
|
694625758 2155376830 106945360
|
||||||
|
4279520523 3615362982 15446773
|
||||||
|
489092940 1655816946 66193390
|
||||||
|
0 3221854550 178998524
|
||||||
|
1882939638 1912164198 20271298
|
||||||
|
178998524 1187862900 104517087
|
||||||
|
288525818 1292379987 6517514
|
||||||
|
995810057 1598284893 57532053
|
||||||
|
3220600544 1992413615 127590475
|
||||||
|
1857243139 195070261 25696499
|
||||||
|
2424262835 1443718326 550802
|
||||||
|
3143673104 1375907946 12442204
|
||||||
|
3776575836 3943040431 220205828
|
||||||
|
1053342110 693558780 494304120
|
||||||
|
2630970071 2286623883 512703033
|
||||||
|
638901084 2284929071 1694812
|
||||||
|
801571118 2836704943 174236
|
||||||
|
640595896 2836879179 54029862
|
||||||
|
4128502701 3756165939 24544656
|
||||||
|
1684527036 520842677 172716103
|
||||||
|
1547646230 2890909041 136880806
|
||||||
|
3524782486 3677409127 61983652
|
||||||
|
3685995340 3524782486 90580496
|
||||||
|
3380558839 500548442 20294235
|
||||||
|
2440816209 1722010336 190153862
|
||||||
|
283515611 2799326916 5010207
|
||||||
|
1903210936 2120004090 35372740
|
||||||
|
561890639 1298897501 77010445
|
||||||
|
555286330 2278324762 6604309
|
||||||
|
1938583676 220766760 125378624
|
||||||
|
3996781664 4163246259 131721037
|
||||||
|
3156115308 1444269128 64485236
|
||||||
|
|
||||||
|
humidity-to-location map:
|
||||||
|
2420477851 2725678119 154870744
|
||||||
|
341010579 1968896618 161603351
|
||||||
|
2771047693 3040747240 63786420
|
||||||
|
1473264654 231223255 158065928
|
||||||
|
300743457 665216997 40267122
|
||||||
|
4266394999 3974648226 28572297
|
||||||
|
44642725 3145344681 187170981
|
||||||
|
3913829571 3489505645 352565428
|
||||||
|
2132898063 571123277 94093720
|
||||||
|
2945529238 1729589230 52970089
|
||||||
|
3205711977 3366573953 87052626
|
||||||
|
3077771609 1429791513 87129347
|
||||||
|
3840363983 3901182638 31190715
|
||||||
|
3674520209 3842071073 59111565
|
||||||
|
3733631774 4003220523 106732209
|
||||||
|
0 2326199067 44642725
|
||||||
|
1631330582 389289183 181834094
|
||||||
|
2226991783 2370841792 193486068
|
||||||
|
2911470947 3332515662 34058291
|
||||||
|
1999501975 1516920860 133396088
|
||||||
|
1813164676 1782559319 186337299
|
||||||
|
502613930 2880548863 91268626
|
||||||
|
1242041399 0 231223255
|
||||||
|
3586449755 4206896842 88070454
|
||||||
|
2834834113 1353642962 76148551
|
||||||
|
3164900956 3104533660 40811021
|
||||||
|
3489505645 4109952732 96944110
|
||||||
|
2910982664 2564327860 488283
|
||||||
|
3292764603 2564816143 160861976
|
||||||
|
231813706 2971817489 68929751
|
||||||
|
2575348595 2130499969 195699098
|
||||||
|
593882556 705484119 648158843
|
||||||
|
3871554698 3932373353 42274873
|
||||||
|
2998499327 1650316948 79272282
|
||||||
33
day5/test
Normal file
33
day5/test
Normal file
|
|
@ -0,0 +1,33 @@
|
||||||
|
seeds: 79 14 55 13
|
||||||
|
|
||||||
|
seed-to-soil map:
|
||||||
|
50 98 2
|
||||||
|
52 50 48
|
||||||
|
|
||||||
|
soil-to-fertilizer map:
|
||||||
|
0 15 37
|
||||||
|
37 52 2
|
||||||
|
39 0 15
|
||||||
|
|
||||||
|
fertilizer-to-water map:
|
||||||
|
49 53 8
|
||||||
|
0 11 42
|
||||||
|
42 0 7
|
||||||
|
57 7 4
|
||||||
|
|
||||||
|
water-to-light map:
|
||||||
|
88 18 7
|
||||||
|
18 25 70
|
||||||
|
|
||||||
|
light-to-temperature map:
|
||||||
|
45 77 23
|
||||||
|
81 45 19
|
||||||
|
68 64 13
|
||||||
|
|
||||||
|
temperature-to-humidity map:
|
||||||
|
0 69 1
|
||||||
|
1 0 69
|
||||||
|
|
||||||
|
humidity-to-location map:
|
||||||
|
60 56 37
|
||||||
|
56 93 4
|
||||||
Loading…
Reference in a new issue