2023 - Day 5

2023/05/PART1.md

@@ -0,0 +1,152 @@
+--- Day 5: If You Give A Seed A Fertilizer ---
+
+You take the boat and find the gardener right where you were told he would be:
+managing a giant "garden" that looks more to you like a farm.
+
+"A water source? Island Island is the water source!" You point out that Snow
+Island isn't receiving any water.
+
+"Oh, we had to stop the water because we ran out of sand to filter it with!
+Can't make snow with dirty water. Don't worry, I'm sure we'll get more sand
+soon; we only turned off the water a few days... weeks... oh no." His face sinks
+into a look of horrified realization.
+
+"I've been so busy making sure everyone here has food that I completely forgot
+to check why we stopped getting more sand! There's a ferry leaving soon that is
+headed over in that direction - it's much faster than your boat. Could you
+please go check it out?"
+
+You barely have time to agree to this request when he brings up another. "While
+you wait for the ferry, maybe you can help us with our food production problem.
+The latest Island Island Almanac just arrived and we're having trouble making
+sense of it."
+
+The almanac (your puzzle input) lists all of the seeds that need to be planted.
+It also lists what type of soil to use with each kind of seed, what type of
+fertilizer to use with each kind of soil, what type of water to use with each
+kind of fertilizer, and so on. Every type of seed, soil, fertilizer and so on is
+identified with a number, but numbers are reused by each category - that is,
+soil 123 and fertilizer 123 aren't necessarily related to each other.
+
+For example:
+
+```
+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
+```
+
+The almanac starts by listing which seeds need to be planted: seeds 79, 14, 55,
+and 13.
+
+The rest of the almanac contains a list of maps which describe how to convert
+numbers from a source category into numbers in a destination category. That is,
+the section that starts with seed-to-soil map: describes how to convert a seed
+number (the source) to a soil number (the destination). This lets the gardener
+and his team know which soil to use with which seeds, which water to use with
+which fertilizer, and so on.
+
+Rather than list every source number and its corresponding destination number
+one by one, the maps describe entire ranges of numbers that can be converted.
+Each line within a map contains three numbers: the destination range start, the
+source range start, and the range length.
+
+Consider again the example seed-to-soil map:
+
+```
+50 98 2
+52 50 48
+```
+
+The first line has a destination range start of 50, a source range start of 98,
+and a range length of 2. This line means that the source range starts at 98 and
+contains two values: 98 and 99. The destination range is the same length, but it
+starts at 50, so its two values are 50 and 51. With this information, you know
+that seed number 98 corresponds to soil number 50 and that seed number 99
+corresponds to soil number 51.
+
+The second line means that the source range starts at 50 and contains 48 values:
+50, 51, ..., 96, 97. This corresponds to a destination range starting at 52 and
+also containing 48 values: 52, 53, ..., 98, 99. So, seed number 53 corresponds
+to soil number 55.
+
+Any source numbers that aren't mapped correspond to the same destination number.
+So, seed number 10 corresponds to soil number 10.
+
+So, the entire list of seed numbers and their corresponding soil numbers looks
+like this:
+
+```
+seed  soil
+0     0
+1     1
+...   ...
+48    48
+49    49
+50    52
+51    53
+...   ...
+96    98
+97    99
+98    50
+99    51
+```
+
+With this map, you can look up the soil number required for each initial seed
+number:
+
+- Seed number 79 corresponds to soil number 81.
+- Seed number 14 corresponds to soil number 14.
+- Seed number 55 corresponds to soil number 57.
+- Seed number 13 corresponds to soil number 13.
+
+The gardener and his team want to get started as soon as possible, so they'd
+like to know the closest location that needs a seed. Using these maps, find the
+lowest location number that corresponds to any of the initial seeds. To do this,
+you'll need to convert each seed number through other categories until you can
+find its corresponding location number. In this example, the corresponding types
+are:
+
+- Seed 79, soil 81, fertilizer 81, water 81, light 74, temperature 78, humidity
+  78, location 82.
+- Seed 14, soil 14, fertilizer 53, water 49, light 42, temperature 42, humidity
+  43, location 43.
+- Seed 55, soil 57, fertilizer 57, water 53, light 46, temperature 82, humidity
+  82, location 86.
+- Seed 13, soil 13, fertilizer 52, water 41, light 34, temperature 34, humidity
+  35, location 35.
+
+So, the lowest location number in this example is 35.
+
+What is the lowest location number that corresponds to any of the initial seed
+numbers?

2023/05/PART2.md

@@ -0,0 +1,30 @@
+--- Part Two ---
+
+Everyone will starve if you only plant such a small number of seeds. Re-reading
+the almanac, it looks like the seeds: line actually describes ranges of seed
+numbers.
+
+The values on the initial seeds: line come in pairs. Within each pair, the first
+value is the start of the range and the second value is the length of the range.
+So, in the first line of the example above:
+
+```
+seeds: 79 14 55 13
+```
+
+This line describes two ranges of seed numbers to be planted in the garden. The
+first range starts with seed number 79 and contains 14 values: 79, 80, ...,
+91, 92. The second range starts with seed number 55 and contains 13 values: 55,
+56, ..., 66, 67.
+
+Now, rather than considering four seed numbers, you need to consider a total of
+27 seed numbers.
+
+In the above example, the lowest location number can be obtained from seed
+number 82, which corresponds to soil 84, fertilizer 84, water 84, light 77,
+temperature 45, humidity 46, and location 46. So, the lowest location number
+is 46.
+
+Consider all of the initial seed numbers listed in the ranges on the first line
+of the almanac. What is the lowest location number that corresponds to any of
+the initial seed numbers?

2023/05/input.txt

@@ -0,0 +1,249 @@
+seeds: 763445965 78570222 1693788857 146680070 1157620425 535920936 3187993807 180072493 1047354752 20193861 2130924847 274042257 20816377 596708258 950268560 11451287 3503767450 182465951 3760349291 265669041
+
+seed-to-soil map:
+0 1894195346 315486903
+1184603419 2977305241 40929361
+1225532780 597717 4698739
+1988113706 1603988885 78481073
+679195301 529385087 505408118
+1781158512 2285166785 39457705
+352613463 2324624490 326581838
+1820616217 1738931330 104130014
+2066594779 2671974456 78036460
+1288754536 1682469958 56461372
+1371340411 3442489267 409818101
+3341036988 1092718505 511270380
+315486903 1857068786 37126560
+1924746231 2209682249 49360033
+1345215908 2259042282 26124503
+2917167497 2651206328 20768128
+1230231519 1034793205 57925300
+2144631239 3421335965 21153302
+2689873172 2750010916 227294325
+1974106264 1843061344 14007442
+2165784541 5296456 524088631
+1288156819 0 597717
+2937935625 3018234602 403101363
+
+soil-to-fertilizer map:
+3849355959 3101885274 170573538
+3006688391 3025445580 66663107
+1656285214 0 92188755
+2361256790 4033128077 180329908
+2073349245 3676064680 287907545
+3458323699 4213457985 81509311
+2607585697 2380345050 99923790
+2541586698 3332501375 61727497
+3789313396 3272458812 60042563
+1858319884 917612384 162600389
+404885474 510011966 407600418
+4019929497 3603127472 72937208
+812485892 1190058688 253881561
+2603314195 2073349245 4271502
+1469824760 92188755 186460454
+0 278649209 231362757
+1249323571 1443940249 220501189
+4285190709 3092108687 9776587
+1066367453 1817839802 182956118
+3257369783 2724171240 184379320
+2707509487 2480268840 111317034
+2818826521 2192483180 187861870
+1748473969 1080212773 109845915
+3441749103 3394228872 16574596
+3142507350 2077620747 114862433
+3539833010 2908550560 116895020
+231362757 1664441438 153398364
+384761121 2000795920 20124353
+3656728030 2591585874 132585366
+3073351498 3963972225 69155852
+4092866705 3410803468 192324004
+
+fertilizer-to-water map:
+2289944373 962149121 35670423
+3187295333 3295892606 34862460
+3798694276 3187295333 48036047
+3633796172 3644673845 164898104
+3222157793 3909959418 311250910
+922447685 2248438960 142418952
+648510907 2390857912 2187794
+3533408703 3809571949 100387469
+650698701 1840321280 271748984
+464371310 553340958 30176545
+3907291549 3330755066 313918779
+2791296727 461310335 25110510
+397451197 486420845 66920113
+3846730323 3235331380 60561226
+2575399801 2393045706 96151163
+1064866637 583517503 106955439
+1308190772 822897256 139251865
+0 236670371 224639964
+2671550964 0 119745763
+1171822076 2112070264 136368696
+224639964 690472942 132424314
+494547855 2489196869 153963052
+2498862112 160132682 76537689
+1447442637 997819544 842501736
+357064278 119745763 40386919
+2325614796 2643159921 173247316
+
+water-to-light map:
+3181220930 3836164803 159006567
+1405924027 2473049234 39930303
+1275636734 1411161599 10830099
+3831476263 1580605379 266491658
+1570444205 1294782382 116379217
+3133505036 2271845049 47715894
+1305612481 2512979537 100311546
+1286466833 1275636734 19145648
+167024508 145118817 64336111
+92584517 615923894 40913901
+2227655152 2098041405 130620812
+2181794752 2613291083 34326669
+433451288 209454928 64553504
+4223684323 2228662217 43182832
+3527642272 3532330812 303833991
+2855274869 2647617752 119788915
+4266867155 2319560943 28100141
+231360619 1167459710 18705935
+2136463524 3995171370 45331228
+2978600831 1421991698 154904205
+4097967921 2825698355 78160170
+0 489813287 92584517
+1686823422 3023927616 328136942
+2014960364 2903858525 116532044
+1512152517 2767406667 58291688
+395185371 1129193793 38265917
+498004792 274008432 215804855
+2975063784 3020390569 3537047
+3340227497 3352064558 180266254
+3524203227 4040502598 3439045
+713809647 656837795 472355998
+1445854330 2395217316 66298187
+3520493751 1576895903 3709476
+4176128091 2347661084 47556232
+2216121421 2461515503 11533731
+2604330501 1847097037 250944368
+2358275964 4043941643 246054537
+133498418 582397804 33526090
+2131492408 4289996180 4971116
+250066554 0 145118817
+
+light-to-temperature map:
+1212130960 1395832798 58636484
+542019293 812004214 195851408
+1706861165 2688952641 3198757
+3097592274 3018951608 116723898
+1148165381 3135675506 2936711
+938881022 300892136 26815610
+2884354982 3318488806 103553821
+789335095 421331130 149545927
+3270968199 1036156523 69989778
+1142047574 1030038716 6117807
+1710059922 1367448764 28384034
+3961474833 1257923390 109525374
+300892136 570877057 241127157
+2564647329 3422042627 200129932
+3534803741 2001828127 16273450
+1738443956 1454469282 486329977
+3717055162 2018101577 244419671
+4071000207 2781125469 223967089
+1030038716 3005092558 13859050
+737870701 358179343 20992797
+3388483069 4209077325 84901810
+3551077191 3622172559 62988195
+3614065386 2769635501 11489968
+3215304333 3262824940 55663866
+2278270544 2395185346 286376785
+1151102092 1940799259 61028868
+3625555354 4044566844 91499808
+2987908803 1106146301 109683471
+1134657064 2681562131 7390510
+2236365744 2353280546 41904800
+1270767444 3685160754 311880998
+1043897766 2262521248 90759298
+2806870879 2692151398 77484103
+3340957977 3997041752 47525092
+3214316172 4293979135 988161
+2764777261 1215829772 42093618
+965696632 379172140 42158990
+3473384879 4147658463 61418862
+2224773933 4136066652 11591811
+1582648442 3201806221 61018719
+758863498 327707746 30471597
+1643667161 3138612217 63194004
+
+temperature-to-humidity map:
+3893671309 2897869925 193525827
+1232495182 999263760 191357681
+2440090529 1477966061 163000786
+3554817869 2745268041 3258240
+2845194314 3091395752 30017739
+4087197136 1397536284 33207741
+131252236 827398049 11627380
+2183328852 2476037434 27127608
+2603091315 2503165042 242102999
+2875212053 1778930312 348370034
+1427151141 891672290 77843721
+1642958327 3928570372 200739395
+3610489285 3219006125 283182024
+3277129360 3580618829 128344865
+2233175686 1190621441 206914843
+891672290 4129309767 165657529
+0 205218291 35419402
+3584280491 3551111757 26208794
+4247745260 1430744025 47222036
+2210456460 3502188149 21171921
+1843697722 2136406304 209010485
+1423852863 3577320551 3298278
+348097907 336470527 490927522
+1057329819 3708963694 175165363
+2231628381 3549564452 1547305
+3268023402 2127300346 9105958
+142879616 0 205218291
+3558076109 3523360070 26204382
+2052708207 2345416789 130620645
+4120404877 969516011 29747749
+35419402 240637693 95832834
+4150152626 3121413491 97592634
+3223582087 3884129057 44441315
+1504994862 1640966847 137963465
+3405474225 2748526281 149343644
+
+humidity-to-location map:
+3554305993 3441523152 94289982
+4052786034 3015714705 242181262
+491965155 895492593 72049890
+2437667299 3726944956 38441480
+0 387558480 141314689
+3811971022 3765386436 101972362
+3648595975 3535813134 51583790
+1318420824 1500487572 135197760
+230758172 30039204 163596268
+3097413876 4221249785 73717511
+3041068351 3257895967 56345525
+1454254795 641271247 181430537
+394354440 1139828795 97610715
+3215016925 2618366793 339289068
+827848339 193635472 113349295
+150184459 306984767 80573713
+1778801395 2099048921 519317872
+1176891800 1379491771 111489820
+1288381620 0 30039204
+3171131387 3891749067 43885538
+564015045 528873169 112398078
+3913943384 3935634605 11560990
+2767014161 3947195595 274054190
+941197634 822701784 72790809
+1453618584 1499851361 636211
+2298119267 3587396924 139548032
+3700179765 3867358798 24390269
+3742730647 1778801395 11181531
+1013988443 967542483 20851096
+141314689 1490981591 8869770
+3925504374 3314241492 127281660
+2476108779 2088802749 10246172
+676413123 988393579 151435216
+3753912178 2957655861 58058844
+2486354951 1789982926 280659210
+3724570034 2070642136 18160613
+1034839539 1237439510 142052261

2023/05/sample.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

2023/05/solution.ts

@@ -0,0 +1,165 @@
+const sample = await Deno.readTextFile("sample.txt");
+const input = await Deno.readTextFile("input.txt");
+
+interface Map {
+  s: number;
+  d: number;
+  l: number;
+}
+
+interface ParsedInput {
+  seeds: number[];
+  seedToSoil: Map[];
+  soilToFertilizer: Map[];
+  fertilizerToWater: Map[];
+  waterToLight: Map[];
+  lightToTemperature: Map[];
+  temperatureToHumidity: Map[];
+  humidityToLocation: Map[];
+}
+
+const computeMap = (maps: Map[]) => (input: number): number => {
+  for (const { s, d, l } of maps) {
+    if (input >= s && input < s + l) return (input - s) + d;
+  }
+  return input;
+};
+
+const parseInput = (input: string): ParsedInput => {
+  const seeds: number[] =
+    input.split("\n\n").shift()?.split(" ").slice(1).map(parseFloat) || [];
+
+  const parsed = input.split("\n\n")
+    .filter(Boolean)
+    .slice(1)
+    .map((map): string[] => map.split(/:\ |\ map:\ *\n*/))
+    .map((
+      [name, rows],
+    ): [string, number[][]] => [
+      name,
+      rows.trim().split(/\n/).map((values) =>
+        values.split(/\ /).map(parseFloat)
+      ),
+    ]);
+
+  let seedToSoil: Map[] = [];
+  let soilToFertilizer: Map[] = [];
+  let fertilizerToWater: Map[] = [];
+  let waterToLight: Map[] = [];
+  let lightToTemperature: Map[] = [];
+  let temperatureToHumidity: Map[] = [];
+  let humidityToLocation: Map[] = [];
+
+  parsed.forEach((
+    [name, mapValues],
+  ) => {
+    const maps = mapValues.map(([d, s, l]) => ({ d, s, l }));
+    if (name === "seed-to-soil") {
+      seedToSoil = maps;
+    } else if (name === "soil-to-fertilizer") {
+      soilToFertilizer = maps;
+    } else if (name === "fertilizer-to-water") {
+      fertilizerToWater = maps;
+    } else if (name === "water-to-light") {
+      waterToLight = maps;
+    } else if (name === "light-to-temperature") {
+      lightToTemperature = maps;
+    } else if (name === "temperature-to-humidity") {
+      temperatureToHumidity = maps;
+    } else if (name === "humidity-to-location") {
+      humidityToLocation = maps;
+    }
+  });
+
+  return {
+    seeds,
+    seedToSoil,
+    soilToFertilizer,
+    fertilizerToWater,
+    waterToLight,
+    lightToTemperature,
+    temperatureToHumidity,
+    humidityToLocation,
+  };
+};
+
+const solvePart1 = (data: string): number => {
+  const {
+    seeds,
+    seedToSoil,
+    soilToFertilizer,
+    fertilizerToWater,
+    waterToLight,
+    lightToTemperature,
+    temperatureToHumidity,
+    humidityToLocation,
+  } = parseInput(data);
+
+  return seeds
+    .map(computeMap(seedToSoil))
+    .map(computeMap(soilToFertilizer))
+    .map(computeMap(fertilizerToWater))
+    .map(computeMap(waterToLight))
+    .map(computeMap(lightToTemperature))
+    .map(computeMap(temperatureToHumidity))
+    .map(computeMap(humidityToLocation))
+    .reduce((m, v) => Math.min(m, v));
+};
+
+console.log("Sample:", solvePart1(sample)); // 35
+console.log("Input", solvePart1(input)); // 265018614
+
+const getRanges = (list: number[]): [number, number][] => {
+  const result: [number, number][] = [];
+  for (let i = 0; i < list.length; i += 2) {
+    result.push([list[i], list[i + 1]]);
+  }
+  return result;
+};
+
+const mapRange = (s: number, l: number, fn: (n: number) => void): void => {
+  for (let i = s; i < s + l; i += 1) {
+    fn(i);
+  }
+};
+
+const solvePart2 = (data: string): number => {
+  const {
+    seeds: seedRanges,
+    seedToSoil,
+    soilToFertilizer,
+    fertilizerToWater,
+    waterToLight,
+    lightToTemperature,
+    temperatureToHumidity,
+    humidityToLocation,
+  } = parseInput(data);
+
+  console.log("getRanges(seedRanges)", getRanges(seedRanges));
+
+  const fn = (n: number): number =>
+    computeMap(humidityToLocation)(
+      computeMap(temperatureToHumidity)(
+        computeMap(lightToTemperature)(
+          computeMap(waterToLight)(
+            computeMap(fertilizerToWater)(
+              computeMap(soilToFertilizer)(computeMap(seedToSoil)(n)),
+            ),
+          ),
+        ),
+      ),
+    );
+
+  let lowest = Number.MAX_VALUE
+  getRanges(seedRanges).forEach(([s, l]) => {
+    console.log("range", s, lowest);
+    mapRange(s, l, (n) => {
+      lowest = Math.min(lowest, fn(n));
+    });
+  });
+
+  return lowest;
+};
+
+console.log("Sample:", solvePart2(sample)); // 46
+console.log("Input", solvePart2(input)); // 63179500

2023/05/test.ts

@@ -0,0 +1,8 @@
+const worker = new Worker(
+  new URL("./worker.ts", import.meta.url).href,
+  {
+    type: "module",
+  },
+);
+
+worker.postMessage({ filename: "./input.txt" });

2023/05/worker.ts

@@ -0,0 +1,8 @@
+//deno-lint-ignore ban-ts-comment
+//@ts-ignore
+self.onmessage = async (e) => {
+  const { filename } = e.data;
+  const text = await Deno.readTextFile(filename);
+  console.log(text);
+  self.close();
+};