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Add solution to 2023-12-05
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fuglede committed Dec 5, 2023
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207 changes: 207 additions & 0 deletions 2023/day05/input
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seeds: 104847962 3583832 1212568077 114894281 3890048781 333451605 1520059863 217361990 310308287 12785610 3492562455 292968049 1901414562 516150861 2474299950 152867148 3394639029 59690410 862612782 176128197

seed-to-soil map:
2023441036 2044296880 396074363
2419515399 3839972576 454994720
274688417 699823315 258919718
533608135 0 431744151
965352286 431744151 161125324
3391658630 2936663910 903308666
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2874510119 1440389999 315892137
1916089471 2440371243 20593195
0 977035576 200749950
1936682666 1957538510 86758370
1440389999 2902130623 34533287
1126477610 592869475 106953840
3190402256 1756282136 201256374
1474923286 2460964438 441166185
1233431450 958743033 18292543

soil-to-fertilizer map:
1479837493 1486696129 480988794
3637384566 3730606485 267472485
70483107 174821741 921411492
3586173142 3071290434 51211424
1960826287 1166716340 319979789
3952751562 3398939385 283772589
0 1096233233 70483107
1166716340 1967684923 313121153
3904857051 3682711974 47894511
2902018973 3122501858 276437527
991894599 0 174821741
3416901681 2902018973 169271461
3178456500 3998078970 238445181

fertilizer-to-water map:
4274676882 2765984054 20290414
3642266392 2324011621 382224743
3159410287 4157769177 137198119
3437898965 2786274468 204367427
2136710407 1497332580 94233249
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2085089038 1304420652 51621369
1407624846 2990641895 345516575
908901118 638701782 307729932
3296608406 1356042021 141290559
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0 946431714 270199336
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4024491135 1815424853 97190521
756566914 0 152334204
1304420652 4054564983 103204194
1753141421 1591565829 223859024

water-to-light map:
139728365 0 27290780
4161521920 2345099742 65970280
3549264451 2411070022 15588060
846553766 4012820620 62155872
3276913175 3215861697 30588309
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3653026602 3908255344 104565276
2007806695 3246450006 21131889
426542603 2677155019 292403006
3265259672 4167732422 11653503
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0 132239073 7256118
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2475610994 4179385925 115581371
4227492200 1949827562 59745244
1915050765 4074976492 92755930
2211629761 722818807 30932493

light-to-temperature map:
3741602262 2758947303 142653736
628739598 2901601039 50811783
1842260329 1084521599 145122645
2990409993 3493390513 390865485
4190333929 4159289690 83510514
984282519 2952412822 202948629
1826968660 3155361451 15291669
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1658000331 3378660522 114729991
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2031396131 1613630517 518213341
265644560 162891745 32939618
162891745 1229644244 102752815
904704230 3170653120 79578289

temperature-to-humidity map:
671484955 1144907174 532089323
1414132335 1960778188 125717021
2631474761 2586973888 1058655511
1991131055 744338927 221864400
2212995455 192320896 28611061
192320896 2186552402 224875394
2241895588 966203327 169532208
1744764149 431490014 67442815
1812206964 2106058626 80493776
516655377 1135735535 9171639
1559412773 1775426812 185351376
2622156499 2577655626 9318262
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525827016 598680988 145657939
1892700740 1676996497 98430315
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2577655626 4250466423 44500873
1539849356 2086495209 19563417
2241606516 598391916 289072
417196290 498932829 99459087

humidity-to-location map:
547577859 2546258172 54451455
2564186976 3913248498 28610653
2460249359 129990669 103937617
257798579 3257354132 21143365
511274864 3365252234 24536388
412475023 3389788622 98799841
2843712442 3615348771 251219053
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53 changes: 53 additions & 0 deletions 2023/day05/solutions.py
Original file line number Diff line number Diff line change
@@ -0,0 +1,53 @@
from functools import reduce
from itertools import count

with open("input") as f:
data = f.read().strip()

seed_line, *maps = data.split("\n\n")
seeds = list(map(int, seed_line.split(":")[1].split()))

fs = []
finvs = []
for m in maps:
ns = [list(map(int, l.split())) for l in m.split("\n")[1:]]

def f(x, ns=ns):
return next(
(
target + x - source
for target, source, n in ns
if source <= x < source + n
),
x,
)

def finv(x, ns=ns):
return next(
(
target + x - source
for source, target, n in ns
if source <= x < source + n
),
x,
)

fs.append(f)
finvs.append(finv)


def compose(*F):
return reduce(lambda f, g: lambda x: f(g(x)), F)


# Part 1
print(min(compose(*fs[::-1])(seed) for seed in seeds))


# Part 2
def is_needed(n):
return any(x <= n < x + y for x, y in zip(seeds[::2], seeds[1::2]))


is_seed_loc = compose(is_needed, compose(*finvs))
print(next(filter(is_seed_loc, count())))
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