diff options
| -rw-r--r-- | aoc23/day05_test.go | 142 | ||||
| -rw-r--r-- | aoc23/input/input05.txt | 238 |
2 files changed, 380 insertions, 0 deletions
diff --git a/aoc23/day05_test.go b/aoc23/day05_test.go new file mode 100644 index 0000000..4b07a76 --- /dev/null +++ b/aoc23/day05_test.go @@ -0,0 +1,142 @@ +package aoc23 + +import ( + "fmt" + "io" + "math" + "strings" + "testing" +) + +type Almanac struct { + seeds []Range + mappings [][]Mapping +} + +func (a *Almanac) Resolve(n int) int { + for _, rs := range a.mappings { + for _, r := range rs { + if found, ok := r.Target(n); ok { + n = found + break + } + } + } + return n +} + +type Mapping struct { + src int + dst int + size int +} + +func (r Mapping) Target(n int) (int, bool) { + if n >= r.src && n <= r.src+r.size { + return r.dst + (n - r.src), true + } + return 0, false +} + +type Range struct{ start, end int } + +func (r Range) Each(f func(int)) { + for i := r.start; i <= r.end; i++ { + f(i) + } +} + +func parseMapping(s string) Mapping { + parts := strings.Fields(s) + if got, want := len(parts), 3; got != want { + panic(fmt.Sprintf("got %d fields in %q, want %d", got, s, want)) + } + ints := transform(parts, atoi) + return Mapping{src: ints[1], dst: ints[0], size: ints[2]} +} + +func parseAlmanac(r io.Reader, seedRange bool) Almanac { + var ( + seeds []Range + mappings [][]Mapping + ) + mappingIdx := -1 + parseLines(r, func(line string) string { + if strings.HasPrefix(line, "seeds:") { + parts := strings.Fields(line) + ints := transform(parts[1:], atoi) + if seedRange { + for i := 0; i < len(ints); i += 2 { + start := ints[i] + end := start + ints[i+1] + seeds = append(seeds, Range{start, end}) + } + } else { + for _, seed := range ints { + seeds = append(seeds, Range{seed, seed}) + } + } + } else if strings.HasSuffix(line, "map:") { + mappings = append(mappings, []Mapping{}) + mappingIdx++ + } else if mappingIdx > -1 && line != "" { + mappings[mappingIdx] = append(mappings[mappingIdx], parseMapping(line)) + } + return "" + }) + return Almanac{seeds, mappings} +} + +func locationNumber(r io.Reader, seedRange bool) int { + a := parseAlmanac(r, seedRange) + best := math.MaxInt + for _, seed := range a.seeds { + seed.Each(func(n int) { + best = min(best, a.Resolve(n)) + }) + } + return best +} + +func TestDay05(t *testing.T) { + 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 +` + assert(t, 35, run(partial(locationNumber, false), inputString(example))) + assert(t, 424490994, run(partial(locationNumber, false), inputFile(5))) + + assert(t, 46, run(partial(locationNumber, true), inputString(example))) + assert(t, 15290096, run(partial(locationNumber, true), inputFile(5))) // Correct, but terribly slow +} diff --git a/aoc23/input/input05.txt b/aoc23/input/input05.txt new file mode 100644 index 0000000..b7f0c0b --- /dev/null +++ b/aoc23/input/input05.txt @@ -0,0 +1,238 @@ +seeds: 3943078016 158366385 481035699 103909769 3553279107 15651230 3322093486 189601966 2957349913 359478652 924423181 691197498 2578953067 27362630 124747783 108079254 1992340665 437203822 2681092979 110901631 + +seed-to-soil map: +2702707184 1771488746 32408643 +1838704579 89787943 256129587 +3308305769 3945110092 140077818 +3628160213 4264964536 30002760 +3481822196 4118626519 146338017 +2314039806 0 23017018 +2094834166 23017018 66770925 +13529560 2374830476 266694587 +1360948085 2280951884 93878592 +2337056824 1405838386 365650360 +2735115827 1389537903 16300483 +2161605091 1122407194 152434715 +2944685788 3581490111 363619981 +3448383587 4085187910 33438609 +293095451 1923371965 152989927 +555976625 1361056107 28481796 +0 2076361892 13529560 +4055868219 3342391034 239099077 +3658162973 2944685788 397705246 +446085378 2641525063 109891247 +584458421 685760755 436646439 +1647644147 2089891452 191060432 +1528169571 1832460171 90911794 +1619081365 1803897389 28562782 +280224147 1348184803 12871304 +1021104860 345917530 339843225 +1454826677 1274841909 73342894 + +soil-to-fertilizer map: +370579153 1660655546 474809840 +1390384163 3890794774 29044725 +3933903064 3062217622 43562309 +2579648014 2135465386 381757066 +3905615715 3862507425 28287349 +4053211235 382332912 208377334 +3718132574 4107484155 187483141 +3977465373 306587050 75745862 +1866333065 230994048 75593002 +1268904151 2940737610 121480012 +3646057320 3790432171 72075254 +845388993 2517222452 423515158 +2291172026 769577840 288475988 +4261588569 3919839499 33378727 +2112304432 590710246 178867594 +1419428888 1213751369 446904177 +2961405080 3105779931 684652240 +230994048 3967899050 139585105 +2097623608 3953218226 14680824 +1941926067 1058053828 155697541 + +fertilizer-to-water map: +0 1551952886 33233684 +961721436 932763195 63696624 +2767354703 3875238046 18117484 +3717194106 2676555200 188038931 +799543557 483022915 162177879 +2428347038 3081230279 28566103 +2872288153 3519235797 218585862 +215425000 1162608123 279396952 +1473270503 411403786 71619129 +2762028477 2930057227 5326226 +3263853515 2169144956 62130350 +3330983617 2935383453 10086546 +2522376237 2231275306 106924906 +2757818051 2103190872 4210426 +3090874015 3187643516 172979500 +2785472187 2530367956 37190043 +1365587214 49710602 107683289 +554985341 330919476 80484310 +3639346972 3109796382 77847134 +1964878739 1442005075 21531118 +2098191120 3737821659 137416387 +1832452033 298110266 32809210 +2456913141 2864594131 65463096 +1025418060 1606654056 340169154 +2277580887 2475812485 29651215 +2416229303 2107401298 12117735 +33233684 176973083 62797441 +157085258 239770524 58339742 +2307232102 2567557999 108997201 +1915168137 0 49710602 +2235607507 3893355530 41973380 +1865261243 1502045992 49906894 +3905233037 3935328910 231121478 +494821952 157393891 19579192 +514401144 996459819 40584197 +4136354515 3360623016 158612781 +3503586692 2945469999 135760280 +635469651 1463536193 38509799 +2629301143 4166450388 128516908 +2822662230 2119519033 49625923 +3325983865 2098191120 4999752 +3341070163 2338200212 137612273 +3478682436 2505463700 24904256 +96031125 1971548655 36328688 +1986409857 1585186570 21467486 +673979450 1037044016 125564107 +1544889632 645200794 287562401 +132359813 1946823210 24725445 + +water-to-light map: +3326310943 1150412752 87200223 +4257088620 4233111242 37878676 +3994159838 4060724644 54228568 +3876001808 4114953212 90976210 +2886658207 1485800780 134153427 +3966978018 4205929422 27181820 +4048388406 3874470488 149045901 +528406865 502600485 237825862 +111547576 1241598488 111964267 +3068561383 1485461466 339314 +3168255879 3056441319 158055064 +3504257503 1453325844 32135622 +2109734789 3372472386 240074722 +3068900697 403245303 99355182 +2027101388 740426347 82633401 +1219093087 1970502974 808008301 +3643122008 1951548756 18954218 +2603944924 279757237 123488066 +766232727 0 10960493 +3712182589 4270989918 1531320 +3536393125 2778511275 106728883 +3482397575 1237612975 3985513 +777193220 1763962961 71462615 +1117452579 1680930659 83032302 +3413511166 3214496383 46428427 +2432743763 2885240158 171201161 +0 3260924810 111547576 +3486383088 1835425576 17874415 +3672475952 3703073187 39706637 +848655835 10960493 268796744 +4197434307 4023516389 37208255 +3459939593 823059748 22457982 +2727432990 1853299991 98248765 +4234642562 4272521238 22446058 +3713713909 3672475952 30597235 +2351588880 1353562755 81154883 +223511843 845517730 304895022 +3744311144 3742779824 131690664 +1200484881 1434717638 18608206 +3020811634 3612547108 47749749 +2349809511 3660296857 1779369 +2825681755 1619954207 60976452 + +light-to-temperature map: +252460180 3718023854 80580651 +3778113118 1519654737 306188725 +333040831 2573805517 96168275 +4084301843 3798604505 210665453 +1694244932 1825843462 379128459 +1487313708 2669973792 206931224 +429209106 2876905016 268167573 +3133421217 3610326681 107697173 +1486370741 3145072589 942967 +697376679 3146015556 464311125 +2152115592 836439718 249469053 +3241118390 214400336 17576418 +214400336 1164650972 38059844 +2073373391 1085908771 78742201 +1161687804 2248952614 324682937 +3258694808 231976754 268511965 +3527206773 1312729085 206925652 +3133251251 2573635551 169966 +2930227394 4091943439 203023857 +2484258126 790765872 45673846 +2639950241 500488719 290277153 +2529931972 1202710816 110018269 +2401584645 4009269958 82673481 +3734132425 2204971921 43980693 + +temperature-to-humidity map: +168091833 268406932 76258451 +3449803430 2843367435 19310453 +2007621581 1615073306 528954706 +1947960540 798304921 59661041 +3469113883 3441273912 247683303 +3980335429 3688957215 155495519 +1382488646 1289756018 231480201 +1613968847 2144028012 203484286 +3030343754 2862677888 310561319 +311459258 1257812898 31943120 +3716797186 4024477040 263538243 +743249314 734822904 63482017 +2843367435 4288015283 6952013 +244350284 201297958 67108974 +806731331 549427536 185395368 +33679712 344665383 134412121 +1817453133 1521236219 93837087 +2850319448 3844452734 180024306 +1193424657 2347512298 189063989 +992126699 0 201297958 +3340905073 3173239207 108898357 +343402378 857965962 399846936 +0 479077504 33679712 +4135830948 3282137564 159136348 +1911290220 512757216 36670320 + +humidity-to-location map: +1586270647 2666237958 31388199 +1639118951 2401662894 243114959 +673413244 1218441073 9004417 +4189219561 4197782169 97185127 +339701505 993997384 224443689 +2088925654 1227445490 16145987 +3048450614 2034241441 196558736 +3245009350 3057456069 37064056 +1990947272 217743214 23964128 +755791330 433456361 436687719 +3750378482 1243591477 29460651 +1347952933 3094520125 238317714 +682417661 3593572644 73373669 +1891967948 3494593320 98979324 +2746577216 1325573050 27089148 +90823161 3346797254 147796066 +238619227 1933159163 101082278 +2884769306 269775053 163681308 +564145194 0 109268050 +2014911400 1273052128 12916400 +2773666364 1295702566 29870484 +0 903174223 90823161 +4286404688 3841991082 8562608 +1617658846 2644777853 21460105 +2714916854 3748178771 31660362 +2275934358 3332837839 13959415 +2027827800 870144080 33030143 +3841991082 4158641967 39140202 +3881131284 3850553690 308088277 +3390548570 2697626157 359829912 +1882233910 1285968528 9734038 +2105071641 2230800177 170862717 +1192479049 1777685279 155473884 +2803536848 3666946313 81232458 +2289893773 1352662198 425023081 +2060857943 241707342 28067711 +3282073406 109268050 108475164 |