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323 lines
10 KiB
323 lines
10 KiB
lights = Hash.new {|h,k| h[k] = 0 }
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instructions = { "turn on" => ->(intensity) { intensity + 1 },
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"turn off" => ->(intensity) { intensity.zero? ? 0 : intensity - 1 },
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"toggle" => ->(intensity) { intensity + 2 } }
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regex = /(turn on|turn off|toggle) (\d+),(\d+) through (\d+),(\d+)/
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DATA.read.scan(regex).each do |instruction, x1,y1, x2,y2|
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min_x,max_x = [x1,x2].map(&:to_i).sort
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min_y,max_y = [y1,y2].map(&:to_i).sort
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instruction = instructions[instruction]
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(min_x..max_x).each do |x|
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(min_y..max_y).each do |y|
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lights[[x,y]] = instruction[lights[[x,y]]]
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end
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end
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end
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puts lights.values.inject(&:+)
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__END__
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turn on 887,9 through 959,629
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turn on 351,678 through 951,908
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toggle 720,196 through 897,994
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toggle 753,664 through 970,926
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toggle 294,259 through 474,326
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toggle 678,333 through 752,957
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toggle 393,804 through 510,976
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toggle 944,498 through 995,928
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toggle 521,303 through 617,366
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toggle 815,811 through 889,828
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turn off 64,253 through 655,960
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turn on 47,485 through 734,977
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turn off 59,119 through 699,734
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toggle 407,898 through 493,955
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toggle 912,966 through 949,991
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turn on 479,990 through 895,990
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toggle 390,589 through 869,766
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toggle 593,903 through 926,943
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toggle 358,439 through 870,528
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turn off 649,410 through 652,875
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turn on 629,834 through 712,895
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toggle 254,555 through 770,901
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toggle 641,832 through 947,850
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turn on 268,448 through 743,777
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turn off 512,123 through 625,874
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turn off 498,262 through 930,811
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toggle 546,310 through 607,773
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turn on 501,505 through 896,909
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turn off 666,796 through 817,924
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toggle 987,789 through 993,809
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toggle 745,8 through 860,693
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toggle 181,983 through 731,988
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turn on 826,174 through 924,883
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turn on 239,228 through 843,993
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turn on 205,613 through 891,667
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toggle 867,873 through 984,896
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turn on 628,251 through 677,681
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toggle 276,956 through 631,964
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turn on 78,358 through 974,713
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turn on 521,360 through 773,597
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turn off 963,52 through 979,502
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turn on 117,151 through 934,622
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toggle 237,91 through 528,164
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turn on 944,269 through 975,453
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toggle 979,460 through 988,964
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turn off 440,254 through 681,507
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toggle 347,100 through 896,785
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turn off 329,592 through 369,985
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turn on 931,960 through 979,985
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toggle 703,3 through 776,36
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toggle 798,120 through 908,550
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turn off 186,605 through 914,709
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turn off 921,725 through 979,956
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toggle 167,34 through 735,249
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turn on 726,781 through 987,936
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toggle 720,336 through 847,756
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turn on 171,630 through 656,769
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toggle 559,485 through 584,534
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toggle 248,712 through 277,988
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toggle 345,594 through 812,723
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turn off 800,108 through 834,618
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turn off 967,439 through 986,869
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turn on 132,653 through 357,696
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turn on 817,38 through 973,662
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toggle 227,491 through 504,793
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turn on 859,886 through 923,919
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toggle 521,835 through 613,847
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turn on 822,787 through 989,847
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turn on 192,142 through 357,846
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turn off 564,945 through 985,945
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toggle 56,481 through 489,978
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toggle 723,526 through 945,792
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turn on 344,149 through 441,640
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toggle 568,927 through 624,952
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turn on 621,784 through 970,788
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toggle 665,783 through 795,981
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toggle 386,610 through 817,730
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toggle 440,399 through 734,417
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toggle 939,201 through 978,803
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turn off 429,982 through 691,991
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toggle 227,137 through 439,822
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toggle 4,848 through 7,932
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turn off 545,146 through 756,943
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turn on 763,863 through 937,994
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turn off 742,254 through 930,512
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turn on 91,931 through 101,942
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toggle 585,106 through 651,425
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turn off 548,44 through 718,352
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turn off 13,230 through 821,361
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turn on 734,629 through 919,631
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toggle 788,552 through 957,972
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toggle 244,747 through 849,773
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turn off 162,553 through 276,887
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turn off 569,577 through 587,604
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toggle 330,641 through 396,986
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toggle 766,423 through 934,495
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turn on 169,70 through 764,939
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toggle 59,352 through 896,404
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toggle 143,245 through 707,320
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toggle 496,24 through 669,507
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toggle 96,748 through 973,753
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toggle 99,818 through 609,995
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turn on 731,193 through 756,509
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turn off 622,55 through 813,365
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turn on 456,490 through 576,548
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turn on 48,421 through 163,674
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turn off 853,861 through 924,964
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turn off 59,963 through 556,987
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turn on 458,710 through 688,847
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toggle 12,484 through 878,562
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toggle 896,725 through 956,847
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turn on 740,289 through 784,345
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turn off 395,840 through 822,845
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toggle 221,241 through 906,384
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turn on 588,49 through 927,496
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turn on 505,962 through 895,962
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toggle 820,112 through 923,143
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turn on 919,792 through 978,982
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toggle 489,461 through 910,737
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turn off 202,642 through 638,940
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turn off 708,953 through 970,960
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toggle 437,291 through 546,381
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turn off 756,279 through 870,943
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turn off 154,657 through 375,703
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turn off 524,622 through 995,779
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toggle 514,221 through 651,850
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toggle 808,464 through 886,646
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toggle 483,537 through 739,840
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toggle 654,769 through 831,825
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turn off 326,37 through 631,69
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toggle 888,403 through 961,597
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toggle 731,176 through 932,413
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turn on 5,498 through 203,835
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toggle 393,813 through 832,816
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toggle 725,689 through 967,888
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toggle 317,14 through 793,425
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toggle 474,97 through 636,542
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turn on 840,622 through 978,920
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toggle 567,374 through 925,439
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toggle 185,42 through 294,810
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toggle 828,303 through 979,770
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toggle 752,335 through 957,733
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toggle 561,947 through 638,965
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