From ea5c6c1e3b28a9b65796b434e750b4f7ad1d87d4 Mon Sep 17 00:00:00 2001 From: Gleb Koval Date: Wed, 6 Dec 2023 03:07:11 +0000 Subject: [PATCH] Day 5 --- README.md | 7 +- day5/.gitignore | 1 + day5/.idea/.gitignore | 8 + day5/.idea/day5.iml | 12 ++ day5/.idea/kotlinc.xml | 6 + day5/.idea/libraries/KotlinJavaRuntime.xml | 23 +++ day5/.idea/misc.xml | 6 + day5/.idea/modules.xml | 8 + day5/.idea/vcs.xml | 6 + day5/eg.txt | 33 ++++ day5/input.txt | 189 +++++++++++++++++++++ day5/main.kt | 100 +++++++++++ 12 files changed, 398 insertions(+), 1 deletion(-) create mode 100644 day5/.gitignore create mode 100644 day5/.idea/.gitignore create mode 100644 day5/.idea/day5.iml create mode 100644 day5/.idea/kotlinc.xml create mode 100644 day5/.idea/libraries/KotlinJavaRuntime.xml create mode 100644 day5/.idea/misc.xml create mode 100644 day5/.idea/modules.xml create mode 100644 day5/.idea/vcs.xml create mode 100644 day5/eg.txt create mode 100644 day5/input.txt create mode 100644 day5/main.kt diff --git a/README.md b/README.md index 5b0b181..1c0d4a5 100644 --- a/README.md +++ b/README.md @@ -23,4 +23,9 @@ I'll probably try to vary languages a bit to get some variety. **Note**: This one was re-written because what I initially wrote belongs on [r/programminghorror](https://www.reddit.com/r/programminghorror/). ### [Day 4](day4/) -**Language**: Golang \ No newline at end of file +**Language**: Golang + +### [Day 5](day5/) +**Language**: Kotlin + +**Note**: Here begin the optimisations! (some people got away with brute force, I decided not to even go there). \ No newline at end of file diff --git a/day5/.gitignore b/day5/.gitignore new file mode 100644 index 0000000..466e248 --- /dev/null +++ b/day5/.gitignore @@ -0,0 +1 @@ +out/ \ No newline at end of file diff --git a/day5/.idea/.gitignore b/day5/.idea/.gitignore new file mode 100644 index 0000000..13566b8 --- /dev/null +++ b/day5/.idea/.gitignore @@ -0,0 +1,8 @@ +# Default ignored files +/shelf/ +/workspace.xml +# Editor-based HTTP Client requests +/httpRequests/ +# Datasource local storage ignored files +/dataSources/ +/dataSources.local.xml diff --git a/day5/.idea/day5.iml b/day5/.idea/day5.iml new file mode 100644 index 0000000..f392c3c --- /dev/null +++ b/day5/.idea/day5.iml @@ -0,0 +1,12 @@ + + + + + + + + + + + + \ No newline at end of file diff --git a/day5/.idea/kotlinc.xml b/day5/.idea/kotlinc.xml new file mode 100644 index 0000000..0dd4b35 --- /dev/null +++ b/day5/.idea/kotlinc.xml @@ -0,0 +1,6 @@ + + + + + \ No newline at end of file diff --git a/day5/.idea/libraries/KotlinJavaRuntime.xml b/day5/.idea/libraries/KotlinJavaRuntime.xml new file mode 100644 index 0000000..3937c2d --- /dev/null +++ b/day5/.idea/libraries/KotlinJavaRuntime.xml @@ -0,0 +1,23 @@ + + + + + + + + + + + + + + + + + + + + + + + \ No newline at end of file diff --git a/day5/.idea/misc.xml b/day5/.idea/misc.xml new file mode 100644 index 0000000..fa5b436 --- /dev/null +++ b/day5/.idea/misc.xml @@ -0,0 +1,6 @@ + + + + + + \ No newline at end of file diff --git a/day5/.idea/modules.xml b/day5/.idea/modules.xml new file mode 100644 index 0000000..8adde7e --- /dev/null +++ b/day5/.idea/modules.xml @@ -0,0 +1,8 @@ + + + + + + + + \ No newline at end of file diff --git a/day5/.idea/vcs.xml b/day5/.idea/vcs.xml new file mode 100644 index 0000000..6c0b863 --- /dev/null +++ b/day5/.idea/vcs.xml @@ -0,0 +1,6 @@ + + + + + + \ No newline at end of file diff --git a/day5/eg.txt b/day5/eg.txt new file mode 100644 index 0000000..bd902a4 --- /dev/null +++ b/day5/eg.txt @@ -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 \ No newline at end of file diff --git a/day5/input.txt b/day5/input.txt new file mode 100644 index 0000000..9b62fd9 --- /dev/null +++ b/day5/input.txt @@ -0,0 +1,189 @@ +seeds: 1848591090 462385043 2611025720 154883670 1508373603 11536371 3692308424 16905163 1203540561 280364121 3755585679 337861951 93589727 738327409 3421539474 257441906 3119409201 243224070 50985980 7961058 + +seed-to-soil map: +3305253869 1699909104 39566623 +3344820492 1130725752 384459310 +3244681427 1739475727 60572442 +951517531 1800048169 868898709 +1820416240 951517531 179208221 +1999624461 2668946878 219310925 +3729279802 1515185062 184724042 +2218935386 2898481077 1015522767 +3234458153 2888257803 10223274 + +soil-to-fertilizer map: +1569885498 220184682 161941102 +3711640300 872157831 344226893 +1934701528 0 25420995 +3394438846 2543943059 181930710 +2957858493 2070565336 135870012 +1416178127 25420995 36071868 +1030022714 2029369539 9317803 +1039340517 1216384724 133685745 +695011633 382125784 335011081 +2317056551 1350070469 640801942 +1731826600 2887680679 151926123 +0 3039606802 695011633 +2030497645 2257384153 286558906 +1960122523 2038687342 31877994 +3576369556 2840047597 42331426 +1536338434 4027621785 33547064 +1452249995 3964767856 62853929 +1331718081 787697785 84460046 +4055867193 2882379023 5301656 +3093728505 3734618435 230149421 +1173026262 61492863 158691819 +1883752723 2206435348 50948805 +3618700982 2725873769 92939318 +1515103924 2818813087 21234510 +1992000517 1990872411 38497128 +3323877926 717136865 70560920 + +fertilizer-to-water map: 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+3123682450 3465674124 119685876 +2479417373 4222809437 72157859 +1957776831 2195006920 74795586 +3089045940 3585360000 28951457 +3820985109 2269802506 288781515 +1285562478 1664965131 530041789 +234319697 234026754 79806762 +3243368326 1344057040 320908091 +3117997397 541633052 5685053 +2551575232 547318105 349893979 +3820303956 540951899 681153 +0 369583040 292943 +314126459 313833516 55749524 +4109766624 2888333314 185200672 +292943 0 234026754 +677064498 3614311457 608497980 +2032572417 897212084 446844956 +2901469211 2700756585 187576729 +1815604267 2558584021 142172564 + +light-to-temperature map: +2658328410 4044901271 250066025 +866264123 157899985 185676775 +2062023507 343576760 307684950 +1535723010 981670684 313982539 +3292868240 2534053678 579746095 +3905180794 3703329819 341571452 +2908394435 3318856014 384473805 +1194970869 1601263273 340752141 +427693043 1299669198 158564104 +748173107 651261710 118091016 +1051940898 1458233302 143029971 +586257147 0 157899985 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+2331952939 1331368999 72869773 +2804021389 1082910224 183222556 +1140184340 2219646006 14135723 +3606348549 4110936733 21327040 +3004762015 1709030955 50302777 +1801464656 0 328658745 +691836870 1759333732 96854175 +447785309 2608487052 21271625 +3400860374 3444117356 205488175 +3055064792 2233781729 261071908 +2185047506 1856187907 146905433 +1697807842 960813548 63676347 +361714620 2494853637 40969400 +2404822712 2933526446 326534662 +402684020 1404238772 45101289 +3972517727 3865904184 11049950 +2158561625 2907040565 26485881 +862902452 2629758677 277281888 +54602155 3288499332 27637368 + +humidity-to-location map: +1368371614 3063096196 39876417 +2318920763 3734391855 138926764 +2980019498 3984955289 310012007 +3732521234 1430493364 562446062 +213274662 484132485 78936678 +0 892307918 213274662 +1023610211 575518293 214768297 +2807160244 2776517513 21582263 +2457847527 2833630022 176634966 +3619027057 2663023336 113494177 +2926107621 1368371614 53911877 +1784866635 3524616139 209775716 +2695523574 3873318619 111636670 +1250827638 790286590 102021328 +3290031505 1992939426 224427328 +954760770 415283044 68849441 +1408248031 2286404732 376618604 +292211340 0 415283044 +1994642351 3102972613 324278412 +2642692366 3034347120 28749076 +3514458833 2798099776 35530246 +1238378508 563069163 12449130 +2828742507 3427251025 97365114 +3549989079 2217366754 69037978 +2671441442 3010264988 24082132 +707494384 1105582580 247266386 +2634482493 1422283491 8209873 \ No newline at end of file diff --git a/day5/main.kt b/day5/main.kt new file mode 100644 index 0000000..1a01d23 --- /dev/null +++ b/day5/main.kt @@ -0,0 +1,100 @@ +import java.nio.file.Files +import java.nio.file.Path +import kotlin.math.max +import kotlin.math.min + +class Mapping(val to: String, private val lines: List) { + fun get(n: Long): Long = + lines.firstNotNullOfOrNull { it.get(n) } ?: n + + fun getInterval(interval: Interval): List = + lines.mapNotNull { it.getInterval(interval) }.let { intervals -> + val result = mutableListOf() + var remaining = listOf(interval) + for ((f, t) in intervals) { + remaining = remaining.flatMap { it.difference(f) } + result.add(t) + } + result.addAll(remaining) + result + } +} + +class MapLine(line: Triple) { + private val interval = Interval(line.second, line.second + line.third - 1) + private val offset = line.first - line.second + + fun get(n: Long): Long? = + if (interval.start <= n && n <= interval.end) n + offset + else null + + fun getInterval(i: Interval): Pair? = + interval.overlap(i)?.let { + it to it.applyOffset(offset) + } +} + +class Interval(val start: Long, val end: Long) { + fun overlap(interval: Interval): Interval? { + val s = max(interval.start, start) + val e = min(interval.end, end) + if (s > e) return null + return Interval(s, e) + } + + fun difference(interval: Interval): List { + val diffs = mutableListOf() + if (start < interval.start) { + diffs.add(Interval(start, min(interval.start - 1, end))) + } + if (interval.end < end) { + diffs.add(Interval(max(interval.end + 1, start), end)) + } + return diffs + } + + fun applyOffset(offset: Long): Interval = + Interval(start + offset, end + offset) +} + +fun main() { + val sections = Files.readString(Path.of("input.txt")) + .split("\n\n") + val seeds = sections[0].substringAfter(": ") + .split(' ') + .map { it.toLong() } + val mappings = sections.subList(1, sections.size).associate { section -> + val lines = section.split('\n') + val (from, to) = lines[0].substringBefore(" map:") + .split("-to-") + val map = Mapping(to, lines.subList(1, lines.size).map { line -> + val (a, b, c) = line.split(' ').map { it.toLong() } + MapLine(Triple(a, b, c)) + }) + from to map + } + val p1 = seeds.minOf { s -> + var category = "seed" + var n = s + while (category != "location") { + val mapping = mappings[category]!! + n = mapping.get(n) + category = mapping.to + } + n + } + println("Part 1: $p1") + + val p2 = run { + var category = "seed" + var intervals = seeds.chunked(2) + .map { (s, l) -> Interval(s, s + l - 1) } + while (category != "location") { + val mapping = mappings[category]!! + intervals = intervals.flatMap { mapping.getInterval(it) } + category = mapping.to + } + intervals.minOf { it.start } + } + println("Part 2: $p2") +} \ No newline at end of file