day5: Complete first puzzle
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23
5/Parsing.hs
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23
5/Parsing.hs
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@ -0,0 +1,23 @@
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module Parsing (
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splitByString
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) where
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import Data.List (isPrefixOf)
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splitByString :: String -> String -> [String]
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splitByString _ "" = []
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splitByString splitter string =
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let (chunk, rest) = spanNextSplit string
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in
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chunk:(splitByString splitter rest)
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where
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spanNextSplit :: String -> (String, String)
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spanNextSplit [] = ([], [])
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spanNextSplit everything@(char:rest)
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| splitter `isPrefixOf` rest =
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([char], (drop ((length splitter) + 1) everything))
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| otherwise =
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let
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(start, end) = spanNextSplit rest
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in
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(char:start, end)
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500
5/input.txt
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500
5/input.txt
Normal file
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@ -0,0 +1,500 @@
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284,294 -> 733,743
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625,347 -> 653,375
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561,848 -> 561,181
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836,102 -> 836,339
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946,941 -> 22,17
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18,954 -> 956,16
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370,142 -> 370,700
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990,966 -> 677,966
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366,603 -> 366,465
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728,942 -> 57,271
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615,493 -> 847,493
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584,281 -> 301,281
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125,356 -> 301,180
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941,569 -> 555,183
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151,116 -> 509,116
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41,18 -> 841,818
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627,670 -> 627,630
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965,472 -> 965,100
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93,404 -> 330,641
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475,963 -> 475,514
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389,389 -> 389,326
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842,565 -> 842,576
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454,700 -> 650,700
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73,810 -> 73,319
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450,212 -> 450,284
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316,392 -> 316,697
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915,592 -> 578,592
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622,485 -> 434,485
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109,853 -> 952,10
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305,73 -> 305,222
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27,489 -> 157,489
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191,979 -> 867,979
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527,329 -> 527,292
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301,645 -> 301,162
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639,730 -> 176,730
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46,964 -> 46,458
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727,422 -> 435,714
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28,552 -> 404,552
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33,108 -> 33,21
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227,249 -> 327,249
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414,903 -> 784,903
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69,422 -> 888,422
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422,924 -> 103,605
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793,353 -> 450,10
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714,682 -> 714,972
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201,745 -> 410,745
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408,713 -> 408,847
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174,842 -> 818,198
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863,353 -> 775,353
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199,780 -> 670,780
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877,947 -> 340,410
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163,202 -> 163,91
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955,919 -> 955,585
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836,271 -> 533,271
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258,366 -> 728,836
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582,749 -> 582,12
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80,40 -> 80,704
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287,213 -> 287,635
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390,546 -> 390,194
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837,511 -> 538,810
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473,281 -> 902,281
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851,865 -> 731,745
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918,59 -> 445,532
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796,215 -> 796,248
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875,111 -> 604,111
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660,805 -> 538,805
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507,850 -> 145,850
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585,861 -> 585,52
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426,74 -> 700,348
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206,405 -> 529,405
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418,333 -> 418,17
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368,457 -> 33,792
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186,81 -> 957,852
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505,283 -> 113,283
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20,878 -> 462,878
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750,237 -> 69,918
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15,280 -> 358,623
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798,981 -> 500,683
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965,970 -> 22,970
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950,970 -> 148,970
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660,392 -> 660,884
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862,405 -> 862,527
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801,283 -> 801,361
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71,837 -> 136,837
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651,438 -> 945,144
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524,607 -> 614,517
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348,955 -> 138,955
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957,164 -> 404,717
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531,581 -> 454,504
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710,185 -> 710,271
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822,86 -> 822,966
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745,233 -> 490,488
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350,823 -> 663,823
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824,67 -> 447,444
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846,667 -> 796,617
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666,24 -> 666,906
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640,39 -> 640,145
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654,481 -> 985,481
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581,894 -> 416,729
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443,11 -> 697,11
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318,627 -> 799,146
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113,78 -> 891,856
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181,149 -> 179,151
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451,74 -> 451,262
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458,726 -> 314,726
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218,662 -> 533,662
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965,108 -> 527,108
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782,481 -> 896,367
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557,927 -> 557,938
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506,242 -> 941,677
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948,778 -> 948,629
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567,816 -> 567,956
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323,773 -> 323,364
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864,980 -> 864,12
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611,699 -> 611,886
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613,392 -> 901,104
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528,905 -> 156,905
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632,206 -> 798,40
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338,237 -> 919,818
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256,889 -> 11,644
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835,52 -> 55,832
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464,144 -> 322,144
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254,747 -> 254,509
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866,892 -> 866,916
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827,946 -> 30,149
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899,84 -> 177,806
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134,634 -> 357,634
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781,492 -> 244,492
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817,762 -> 817,976
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818,749 -> 818,860
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262,480 -> 263,480
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409,576 -> 409,698
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242,151 -> 981,890
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149,519 -> 149,557
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42,990 -> 42,930
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687,974 -> 50,337
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758,382 -> 465,382
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760,861 -> 760,934
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17,835 -> 17,915
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645,923 -> 645,648
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702,116 -> 72,746
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153,162 -> 955,964
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185,101 -> 918,834
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554,179 -> 554,353
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879,673 -> 879,949
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368,13 -> 368,512
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582,105 -> 591,114
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146,291 -> 600,745
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609,538 -> 930,538
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320,604 -> 320,146
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566,698 -> 443,575
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167,708 -> 844,31
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712,630 -> 712,421
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912,930 -> 64,82
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980,931 -> 87,38
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23,893 -> 888,28
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640,435 -> 676,435
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701,516 -> 190,516
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684,145 -> 62,767
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127,471 -> 91,435
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685,197 -> 78,197
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103,493 -> 103,522
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309,986 -> 309,850
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938,270 -> 938,300
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295,72 -> 354,72
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948,889 -> 948,455
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254,733 -> 254,175
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95,329 -> 942,329
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19,672 -> 19,445
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206,807 -> 206,934
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886,961 -> 886,690
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117,386 -> 117,292
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199,59 -> 668,528
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299,263 -> 299,878
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28,295 -> 638,905
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10,140 -> 276,406
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279,526 -> 921,526
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485,128 -> 856,499
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418,398 -> 186,398
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296,577 -> 296,521
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514,261 -> 10,765
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691,673 -> 776,758
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131,430 -> 152,430
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858,85 -> 62,85
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394,846 -> 270,970
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827,913 -> 827,376
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634,669 -> 910,669
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12,53 -> 945,986
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782,467 -> 782,421
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159,832 -> 109,832
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793,807 -> 79,93
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120,584 -> 356,584
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645,16 -> 645,355
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526,685 -> 217,376
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296,305 -> 296,929
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954,144 -> 954,839
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748,88 -> 103,733
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523,804 -> 473,754
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524,316 -> 524,756
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696,183 -> 912,183
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288,564 -> 55,797
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568,103 -> 568,348
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468,626 -> 682,412
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163,163 -> 961,961
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762,824 -> 27,89
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623,625 -> 32,34
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865,343 -> 490,718
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259,458 -> 259,33
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944,660 -> 944,176
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781,804 -> 826,759
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15,702 -> 15,553
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403,310 -> 918,825
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438,734 -> 835,734
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825,13 -> 825,245
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129,611 -> 370,611
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49,939 -> 172,939
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687,906 -> 687,532
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629,482 -> 273,126
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727,218 -> 424,218
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447,451 -> 233,451
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142,779 -> 813,779
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527,27 -> 527,804
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482,55 -> 482,200
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39,264 -> 806,264
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884,636 -> 458,636
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467,121 -> 199,389
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856,925 -> 856,666
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666,359 -> 378,359
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11,946 -> 705,946
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491,281 -> 940,730
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86,112 -> 918,944
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974,807 -> 974,707
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445,67 -> 914,536
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953,394 -> 953,822
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468,398 -> 157,87
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231,620 -> 231,646
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979,869 -> 979,911
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450,330 -> 450,79
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675,659 -> 617,659
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66,181 -> 66,723
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181,406 -> 181,192
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908,334 -> 908,526
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254,891 -> 282,891
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777,791 -> 127,141
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469,58 -> 694,58
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954,957 -> 566,569
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957,957 -> 123,123
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741,359 -> 741,986
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763,526 -> 763,101
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857,427 -> 600,170
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527,756 -> 490,719
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625,249 -> 397,249
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798,702 -> 712,702
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868,75 -> 868,853
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332,296 -> 332,629
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211,829 -> 100,940
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12,139 -> 12,218
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655,978 -> 655,242
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99,852 -> 855,96
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486,267 -> 486,855
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474,90 -> 474,244
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948,491 -> 186,491
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896,59 -> 278,677
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295,732 -> 629,732
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860,936 -> 860,556
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143,790 -> 143,26
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371,847 -> 395,847
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739,301 -> 739,44
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384,716 -> 748,716
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848,423 -> 848,923
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855,23 -> 218,660
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381,805 -> 381,438
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451,610 -> 91,610
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906,957 -> 191,957
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118,675 -> 169,675
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836,818 -> 95,818
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368,945 -> 825,488
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165,299 -> 899,299
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392,327 -> 926,861
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663,16 -> 131,548
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630,302 -> 888,302
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206,869 -> 206,331
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979,413 -> 979,204
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894,860 -> 62,28
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444,897 -> 962,379
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550,158 -> 550,885
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845,736 -> 811,736
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846,857 -> 12,857
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981,730 -> 981,154
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694,835 -> 88,835
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21,101 -> 21,385
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19,960 -> 964,15
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283,721 -> 450,721
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59,136 -> 758,835
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287,313 -> 719,313
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471,252 -> 849,630
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682,189 -> 168,189
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10,921 -> 774,157
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884,598 -> 884,540
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207,615 -> 207,443
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627,408 -> 67,408
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285,36 -> 285,792
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116,585 -> 254,585
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183,86 -> 183,702
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220,138 -> 868,138
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833,68 -> 286,615
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367,534 -> 766,534
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907,514 -> 621,228
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133,593 -> 133,581
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164,727 -> 768,123
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566,227 -> 566,555
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983,988 -> 105,110
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620,177 -> 620,821
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612,413 -> 612,176
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168,889 -> 168,210
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871,487 -> 559,175
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399,870 -> 761,870
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236,976 -> 582,630
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699,216 -> 699,887
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153,745 -> 790,745
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444,749 -> 444,257
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808,165 -> 939,165
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546,525 -> 95,976
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583,179 -> 373,389
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235,816 -> 840,816
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744,89 -> 832,89
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425,317 -> 465,357
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267,235 -> 114,82
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887,59 -> 572,374
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808,237 -> 808,626
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431,352 -> 400,383
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815,376 -> 815,905
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249,218 -> 989,958
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120,435 -> 357,198
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807,551 -> 490,234
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910,524 -> 910,725
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802,304 -> 447,659
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789,228 -> 678,339
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229,322 -> 52,322
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658,393 -> 506,393
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378,438 -> 378,569
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163,981 -> 473,671
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537,984 -> 935,586
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58,945 -> 966,37
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132,696 -> 565,263
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136,813 -> 136,284
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606,656 -> 298,348
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533,572 -> 673,712
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872,912 -> 301,341
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16,287 -> 16,613
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571,541 -> 980,950
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117,495 -> 35,495
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85,79 -> 682,676
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425,431 -> 117,739
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982,984 -> 10,12
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28,75 -> 431,478
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259,529 -> 259,436
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762,267 -> 170,859
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323,135 -> 929,741
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81,238 -> 561,718
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128,213 -> 876,961
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649,466 -> 649,540
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715,863 -> 119,863
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830,624 -> 794,660
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123,968 -> 977,114
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489,466 -> 489,811
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27,10 -> 980,963
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255,732 -> 255,484
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574,829 -> 431,829
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548,743 -> 22,217
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903,297 -> 903,763
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684,774 -> 64,154
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260,823 -> 683,823
|
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422,211 -> 422,826
|
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10,196 -> 988,196
|
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108,802 -> 15,802
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104,70 -> 104,452
|
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885,59 -> 885,36
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68,854 -> 68,774
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731,935 -> 731,718
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657,986 -> 617,986
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732,292 -> 732,32
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841,56 -> 841,83
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74,108 -> 862,896
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654,895 -> 323,895
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374,952 -> 374,217
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90,723 -> 750,63
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246,89 -> 911,754
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453,301 -> 755,301
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983,988 -> 23,28
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81,705 -> 133,757
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752,743 -> 752,397
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53,243 -> 449,639
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451,811 -> 451,187
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26,672 -> 26,699
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254,861 -> 943,861
|
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643,740 -> 643,966
|
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486,655 -> 149,318
|
||||
375,146 -> 375,973
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76,293 -> 103,293
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246,398 -> 246,248
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324,392 -> 595,121
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||||
130,577 -> 131,577
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||||
380,623 -> 549,454
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224,181 -> 985,942
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310,223 -> 310,594
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||||
23,982 -> 23,738
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19,858 -> 832,858
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726,531 -> 726,578
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730,433 -> 196,433
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606,599 -> 242,599
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444,832 -> 444,238
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198,870 -> 47,870
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944,473 -> 795,473
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737,386 -> 178,945
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328,902 -> 328,644
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422,851 -> 567,851
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674,781 -> 215,781
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920,757 -> 302,757
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225,932 -> 640,517
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359,337 -> 791,337
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935,430 -> 935,262
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772,850 -> 280,358
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175,829 -> 175,451
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938,204 -> 234,908
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253,749 -> 308,749
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704,458 -> 468,458
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222,95 -> 743,616
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968,840 -> 123,840
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491,619 -> 491,889
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979,580 -> 979,459
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901,193 -> 171,923
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246,155 -> 246,680
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711,755 -> 247,755
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671,734 -> 475,734
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803,783 -> 129,109
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145,890 -> 920,115
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463,521 -> 463,700
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782,99 -> 782,311
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547,467 -> 630,467
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14,88 -> 795,869
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653,899 -> 653,90
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488,874 -> 488,570
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93,879 -> 645,327
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320,658 -> 40,938
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611,246 -> 611,22
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258,935 -> 258,829
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931,436 -> 931,263
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252,460 -> 252,461
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490,382 -> 965,382
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242,89 -> 242,617
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271,111 -> 595,435
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462,706 -> 242,486
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557,328 -> 747,328
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486,99 -> 486,333
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156,40 -> 488,372
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323,482 -> 138,297
|
||||
595,539 -> 812,756
|
||||
923,861 -> 377,315
|
||||
934,952 -> 256,274
|
||||
314,777 -> 314,12
|
||||
508,47 -> 508,144
|
||||
888,807 -> 701,807
|
||||
745,774 -> 878,907
|
||||
740,716 -> 740,215
|
||||
62,43 -> 62,12
|
||||
571,196 -> 454,196
|
||||
568,107 -> 408,107
|
||||
549,676 -> 404,676
|
||||
595,573 -> 595,970
|
||||
148,168 -> 193,123
|
||||
763,71 -> 759,71
|
||||
797,64 -> 307,64
|
||||
959,984 -> 32,57
|
||||
457,562 -> 634,562
|
||||
127,521 -> 601,47
|
||||
112,296 -> 112,120
|
||||
148,755 -> 451,755
|
||||
636,494 -> 870,494
|
||||
910,242 -> 945,277
|
||||
912,911 -> 912,892
|
||||
759,815 -> 759,314
|
||||
391,285 -> 391,959
|
||||
455,460 -> 182,460
|
||||
112,78 -> 112,385
|
||||
842,179 -> 842,592
|
||||
236,424 -> 421,424
|
||||
508,907 -> 30,907
|
||||
637,219 -> 34,822
|
||||
503,375 -> 503,205
|
||||
570,533 -> 626,533
|
||||
658,11 -> 658,94
|
||||
179,286 -> 326,433
|
||||
918,214 -> 200,932
|
||||
339,887 -> 81,887
|
||||
794,91 -> 50,835
|
||||
225,356 -> 225,261
|
||||
80,160 -> 80,335
|
||||
148,64 -> 847,763
|
||||
595,393 -> 941,393
|
||||
135
5/ventnavigator.hs
Normal file
135
5/ventnavigator.hs
Normal file
|
|
@ -0,0 +1,135 @@
|
|||
import Data.List (nub, tails)
|
||||
import Parsing (splitByString)
|
||||
|
||||
type Line = ((Int, Int), (Int, Int))
|
||||
|
||||
main :: IO ()
|
||||
main = do
|
||||
input <- getContents
|
||||
let
|
||||
vents = parseVents input
|
||||
putStrLn (show (solution1 vents))
|
||||
|
||||
solution1 :: [Line] -> Int
|
||||
solution1 = length . nub . intersectAll . filterDiagonal
|
||||
|
||||
intersectAll :: [Line] -> [(Int, Int)]
|
||||
intersectAll =
|
||||
flatten . (map intersectOne) . (combinations 2)
|
||||
where
|
||||
intersectOne :: [Line] -> [(Int, Int)]
|
||||
intersectOne [] = []
|
||||
intersectOne (vent:others) = flatten (map (intersect vent) others)
|
||||
|
||||
intersect :: Line -> Line -> [(Int, Int)]
|
||||
intersect ((x1, y1), (x1', y1')) ((x2, y2), (x2', y2'))
|
||||
-- Colinear - In these cases, we may have multiple intersections
|
||||
| all (== x1) [x1', x2, x2'] =
|
||||
(map (\y -> (x1,y)) (intersect1D (sortedTuple (y1, y1')) (sortedTuple (y2, y2'))))
|
||||
| all (== y1) [y1', y2, y2'] =
|
||||
(map (\x -> (x,y1)) (intersect1D (sortedTuple (x1, x1')) (sortedTuple (x2, x2'))))
|
||||
-- Not colinear - We can find out if these intersect by simply
|
||||
-- checking whether the second line goes through the
|
||||
-- horizontal/vertical range of the first (whichever line the first
|
||||
-- segment lives on)
|
||||
| (x1 == x1' && y2 == y2') =
|
||||
if (min x2 x2') <= x1 && (max x2 x2') >= x1 && (min y1 y1') <= y2 && (max y1 y1') >= y2
|
||||
then
|
||||
[(x1,y2)]
|
||||
else
|
||||
[]
|
||||
| (y1 == y1' && x2 == x2') =
|
||||
if (min y2 y2') <= y1 && (max y2 y2') >= y1 && (min x1 x1') <= x2 && (max x1 x1') >= x2
|
||||
then
|
||||
[(x2,y1)]
|
||||
else
|
||||
[]
|
||||
-- In all other cases, we consider the lines not to intersect, since
|
||||
-- diagonal lines are out of scope
|
||||
| otherwise = []
|
||||
where
|
||||
sortedTuple :: (Int, Int) -> (Int, Int)
|
||||
sortedTuple (a, b)
|
||||
| a > b = (b, a)
|
||||
| otherwise = (a, b)
|
||||
intersect1D :: (Int, Int) -> (Int, Int) -> [Int]
|
||||
intersect1D (a, b) (c, d) =
|
||||
let
|
||||
start = max a c
|
||||
end = min b d
|
||||
in
|
||||
[start..end]
|
||||
|
||||
filterDiagonal :: [Line] -> [Line]
|
||||
filterDiagonal = filter (not . isDiagonal)
|
||||
where
|
||||
isDiagonal :: Line -> Bool
|
||||
isDiagonal ((x, y), (x', y')) = x /= x' && y /= y'
|
||||
|
||||
parseVents :: String -> [Line]
|
||||
parseVents = tupelize . splitUp
|
||||
where
|
||||
tupelize :: [[[Int]]] -> [Line]
|
||||
tupelize = map subTupelize
|
||||
where
|
||||
subTupelize :: [[Int]] -> Line
|
||||
subTupelize [[a, b], [c, d]] = ((a, b), (c, d))
|
||||
-- For our parsing purposes, we don't need to cover error
|
||||
-- cases
|
||||
subTupelize _ = undefined
|
||||
splitUp :: String -> [[[Int]]]
|
||||
splitUp = (map (map (map read))) . (map (map (splitByString ","))) . (map (splitByString " -> ")) . lines
|
||||
|
||||
-- Missing stdlib functions
|
||||
|
||||
combinations :: Int -> [a] -> [[a]]
|
||||
combinations 0 _ = [[]]
|
||||
combinations n xs = [y:ys | y:xs' <- tails xs
|
||||
, ys <- combinations (n-1) xs']
|
||||
|
||||
flatten :: [[a]] -> [a]
|
||||
flatten = foldr1 (++)
|
||||
|
||||
-- Tests
|
||||
|
||||
testInput1 :: String
|
||||
testInput1 = unlines [
|
||||
"0,9 -> 5,9",
|
||||
"8,0 -> 0,8",
|
||||
"9,4 -> 3,4",
|
||||
"2,2 -> 2,1",
|
||||
"7,0 -> 7,4",
|
||||
"6,4 -> 2,0",
|
||||
"0,9 -> 2,9",
|
||||
"3,4 -> 1,4",
|
||||
"0,0 -> 8,8",
|
||||
"5,5 -> 8,2"
|
||||
]
|
||||
|
||||
test1 = solution1 (parseVents testInput1)
|
||||
|
||||
testIntersect1 = intersect ((0, 0), (0, 5)) ((0, 2), (0, 4)) == [(0, 2), (0, 3), (0, 4)]
|
||||
testIntersect2 = intersect ((0, 0), (0, 5)) ((0, 5), (0, 6)) == [(0, 5)]
|
||||
testIntersect3 = intersect ((0, 0), (0, 5)) ((0, 6), (0, 7)) == []
|
||||
testIntersect4 = intersect ((0, 0), (5, 0)) ((2, 0), (4, 0)) == [(2, 0), (3, 0), (4, 0)]
|
||||
testIntersect5 = intersect ((0, 0), (0, 5)) ((0, 2), (4, 2)) == [(0, 2)]
|
||||
testIntersect6 = intersect ((0, 0), (0, 5)) ((0, 3), (4, 3)) == [(0, 3)]
|
||||
testIntersect7 = intersect ((1, 0), (1, 5)) ((0, 2), (4, 2)) == [(1, 2)]
|
||||
testIntersect8 = intersect ((4, 0), (4, 5)) ((0, 2), (4, 2)) == [(4, 2)]
|
||||
testIntersect9 = intersect ((1, 0), (1, 5)) ((2, 2), (4, 2)) == []
|
||||
testIntersect10 = intersect ((9, 4), (3, 4)) ((7, 0), (7, 4)) == [(7, 4)]
|
||||
testIntersect11 = intersect ((2, 2), (2, 1)) ((3, 4), (1, 4)) == []
|
||||
testIntersect12 = intersect ((0, 9), (5, 9)) ((7, 0), (7, 4)) == []
|
||||
|
||||
testIntersect =
|
||||
all (== True) [
|
||||
testIntersect1,
|
||||
testIntersect2,
|
||||
testIntersect3,
|
||||
testIntersect4,
|
||||
testIntersect5,
|
||||
testIntersect6,
|
||||
testIntersect7,
|
||||
testIntersect8,
|
||||
testIntersect9
|
||||
]
|
||||
Loading…
Reference in a new issue