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mortaliskmortalisk
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start day14
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‎day14/input

+137
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1+
497,60 -> 497,59 -> 497,60 -> 499,60 -> 499,55 -> 499,60 -> 501,60 -> 501,54 -> 501,60 -> 503,60 -> 503,53 -> 503,60 -> 505,60 -> 505,53 -> 505,60 -> 507,60 -> 507,52 -> 507,60 -> 509,60 -> 509,53 -> 509,60 -> 511,60 -> 511,58 -> 511,60
2+
497,60 -> 497,59 -> 497,60 -> 499,60 -> 499,55 -> 499,60 -> 501,60 -> 501,54 -> 501,60 -> 503,60 -> 503,53 -> 503,60 -> 505,60 -> 505,53 -> 505,60 -> 507,60 -> 507,52 -> 507,60 -> 509,60 -> 509,53 -> 509,60 -> 511,60 -> 511,58 -> 511,60
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497,76 -> 497,80 -> 494,80 -> 494,86 -> 508,86 -> 508,80 -> 503,80 -> 503,76
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498,13 -> 502,13
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525,120 -> 525,122 -> 522,122 -> 522,130 -> 535,130 -> 535,122 -> 531,122 -> 531,120
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504,21 -> 508,21
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492,17 -> 496,17
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534,137 -> 538,137
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497,60 -> 497,59 -> 497,60 -> 499,60 -> 499,55 -> 499,60 -> 501,60 -> 501,54 -> 501,60 -> 503,60 -> 503,53 -> 503,60 -> 505,60 -> 505,53 -> 505,60 -> 507,60 -> 507,52 -> 507,60 -> 509,60 -> 509,53 -> 509,60 -> 511,60 -> 511,58 -> 511,60
10+
479,34 -> 479,32 -> 479,34 -> 481,34 -> 481,30 -> 481,34 -> 483,34 -> 483,26 -> 483,34 -> 485,34 -> 485,25 -> 485,34 -> 487,34 -> 487,26 -> 487,34 -> 489,34 -> 489,32 -> 489,34
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469,37 -> 469,38 -> 487,38 -> 487,37
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548,160 -> 548,161 -> 561,161 -> 561,160
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497,60 -> 497,59 -> 497,60 -> 499,60 -> 499,55 -> 499,60 -> 501,60 -> 501,54 -> 501,60 -> 503,60 -> 503,53 -> 503,60 -> 505,60 -> 505,53 -> 505,60 -> 507,60 -> 507,52 -> 507,60 -> 509,60 -> 509,53 -> 509,60 -> 511,60 -> 511,58 -> 511,60
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497,76 -> 497,80 -> 494,80 -> 494,86 -> 508,86 -> 508,80 -> 503,80 -> 503,76
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497,60 -> 497,59 -> 497,60 -> 499,60 -> 499,55 -> 499,60 -> 501,60 -> 501,54 -> 501,60 -> 503,60 -> 503,53 -> 503,60 -> 505,60 -> 505,53 -> 505,60 -> 507,60 -> 507,52 -> 507,60 -> 509,60 -> 509,53 -> 509,60 -> 511,60 -> 511,58 -> 511,60
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479,34 -> 479,32 -> 479,34 -> 481,34 -> 481,30 -> 481,34 -> 483,34 -> 483,26 -> 483,34 -> 485,34 -> 485,25 -> 485,34 -> 487,34 -> 487,26 -> 487,34 -> 489,34 -> 489,32 -> 489,34
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525,120 -> 525,122 -> 522,122 -> 522,130 -> 535,130 -> 535,122 -> 531,122 -> 531,120
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497,60 -> 497,59 -> 497,60 -> 499,60 -> 499,55 -> 499,60 -> 501,60 -> 501,54 -> 501,60 -> 503,60 -> 503,53 -> 503,60 -> 505,60 -> 505,53 -> 505,60 -> 507,60 -> 507,52 -> 507,60 -> 509,60 -> 509,53 -> 509,60 -> 511,60 -> 511,58 -> 511,60
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514,110 -> 514,103 -> 514,110 -> 516,110 -> 516,101 -> 516,110 -> 518,110 -> 518,105 -> 518,110
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479,34 -> 479,32 -> 479,34 -> 481,34 -> 481,30 -> 481,34 -> 483,34 -> 483,26 -> 483,34 -> 485,34 -> 485,25 -> 485,34 -> 487,34 -> 487,26 -> 487,34 -> 489,34 -> 489,32 -> 489,34
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469,37 -> 469,38 -> 487,38 -> 487,37
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537,139 -> 537,140 -> 548,140 -> 548,139
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523,117 -> 527,117
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501,15 -> 505,15
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514,110 -> 514,103 -> 514,110 -> 516,110 -> 516,101 -> 516,110 -> 518,110 -> 518,105 -> 518,110
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497,76 -> 497,80 -> 494,80 -> 494,86 -> 508,86 -> 508,80 -> 503,80 -> 503,76
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514,110 -> 514,103 -> 514,110 -> 516,110 -> 516,101 -> 516,110 -> 518,110 -> 518,105 -> 518,110
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545,146 -> 545,150 -> 537,150 -> 537,156 -> 551,156 -> 551,150 -> 548,150 -> 548,146
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479,34 -> 479,32 -> 479,34 -> 481,34 -> 481,30 -> 481,34 -> 483,34 -> 483,26 -> 483,34 -> 485,34 -> 485,25 -> 485,34 -> 487,34 -> 487,26 -> 487,34 -> 489,34 -> 489,32 -> 489,34
30+
492,21 -> 496,21
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548,160 -> 548,161 -> 561,161 -> 561,160
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491,73 -> 491,63 -> 491,73 -> 493,73 -> 493,65 -> 493,73 -> 495,73 -> 495,68 -> 495,73 -> 497,73 -> 497,67 -> 497,73 -> 499,73 -> 499,68 -> 499,73
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497,60 -> 497,59 -> 497,60 -> 499,60 -> 499,55 -> 499,60 -> 501,60 -> 501,54 -> 501,60 -> 503,60 -> 503,53 -> 503,60 -> 505,60 -> 505,53 -> 505,60 -> 507,60 -> 507,52 -> 507,60 -> 509,60 -> 509,53 -> 509,60 -> 511,60 -> 511,58 -> 511,60
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497,60 -> 497,59 -> 497,60 -> 499,60 -> 499,55 -> 499,60 -> 501,60 -> 501,54 -> 501,60 -> 503,60 -> 503,53 -> 503,60 -> 505,60 -> 505,53 -> 505,60 -> 507,60 -> 507,52 -> 507,60 -> 509,60 -> 509,53 -> 509,60 -> 511,60 -> 511,58 -> 511,60
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525,120 -> 525,122 -> 522,122 -> 522,130 -> 535,130 -> 535,122 -> 531,122 -> 531,120
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469,37 -> 469,38 -> 487,38 -> 487,37
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497,60 -> 497,59 -> 497,60 -> 499,60 -> 499,55 -> 499,60 -> 501,60 -> 501,54 -> 501,60 -> 503,60 -> 503,53 -> 503,60 -> 505,60 -> 505,53 -> 505,60 -> 507,60 -> 507,52 -> 507,60 -> 509,60 -> 509,53 -> 509,60 -> 511,60 -> 511,58 -> 511,60
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525,120 -> 525,122 -> 522,122 -> 522,130 -> 535,130 -> 535,122 -> 531,122 -> 531,120
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481,45 -> 486,45
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495,15 -> 499,15
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525,120 -> 525,122 -> 522,122 -> 522,130 -> 535,130 -> 535,122 -> 531,122 -> 531,120
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491,73 -> 491,63 -> 491,73 -> 493,73 -> 493,65 -> 493,73 -> 495,73 -> 495,68 -> 495,73 -> 497,73 -> 497,67 -> 497,73 -> 499,73 -> 499,68 -> 499,73
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491,73 -> 491,63 -> 491,73 -> 493,73 -> 493,65 -> 493,73 -> 495,73 -> 495,68 -> 495,73 -> 497,73 -> 497,67 -> 497,73 -> 499,73 -> 499,68 -> 499,73
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497,60 -> 497,59 -> 497,60 -> 499,60 -> 499,55 -> 499,60 -> 501,60 -> 501,54 -> 501,60 -> 503,60 -> 503,53 -> 503,60 -> 505,60 -> 505,53 -> 505,60 -> 507,60 -> 507,52 -> 507,60 -> 509,60 -> 509,53 -> 509,60 -> 511,60 -> 511,58 -> 511,60
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514,110 -> 514,103 -> 514,110 -> 516,110 -> 516,101 -> 516,110 -> 518,110 -> 518,105 -> 518,110
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547,143 -> 552,143
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497,60 -> 497,59 -> 497,60 -> 499,60 -> 499,55 -> 499,60 -> 501,60 -> 501,54 -> 501,60 -> 503,60 -> 503,53 -> 503,60 -> 505,60 -> 505,53 -> 505,60 -> 507,60 -> 507,52 -> 507,60 -> 509,60 -> 509,53 -> 509,60 -> 511,60 -> 511,58 -> 511,60
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479,34 -> 479,32 -> 479,34 -> 481,34 -> 481,30 -> 481,34 -> 483,34 -> 483,26 -> 483,34 -> 485,34 -> 485,25 -> 485,34 -> 487,34 -> 487,26 -> 487,34 -> 489,34 -> 489,32 -> 489,34
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497,60 -> 497,59 -> 497,60 -> 499,60 -> 499,55 -> 499,60 -> 501,60 -> 501,54 -> 501,60 -> 503,60 -> 503,53 -> 503,60 -> 505,60 -> 505,53 -> 505,60 -> 507,60 -> 507,52 -> 507,60 -> 509,60 -> 509,53 -> 509,60 -> 511,60 -> 511,58 -> 511,60
50+
479,34 -> 479,32 -> 479,34 -> 481,34 -> 481,30 -> 481,34 -> 483,34 -> 483,26 -> 483,34 -> 485,34 -> 485,25 -> 485,34 -> 487,34 -> 487,26 -> 487,34 -> 489,34 -> 489,32 -> 489,34
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545,146 -> 545,150 -> 537,150 -> 537,156 -> 551,156 -> 551,150 -> 548,150 -> 548,146
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511,117 -> 515,117
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479,34 -> 479,32 -> 479,34 -> 481,34 -> 481,30 -> 481,34 -> 483,34 -> 483,26 -> 483,34 -> 485,34 -> 485,25 -> 485,34 -> 487,34 -> 487,26 -> 487,34 -> 489,34 -> 489,32 -> 489,34
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484,43 -> 489,43
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491,73 -> 491,63 -> 491,73 -> 493,73 -> 493,65 -> 493,73 -> 495,73 -> 495,68 -> 495,73 -> 497,73 -> 497,67 -> 497,73 -> 499,73 -> 499,68 -> 499,73
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497,60 -> 497,59 -> 497,60 -> 499,60 -> 499,55 -> 499,60 -> 501,60 -> 501,54 -> 501,60 -> 503,60 -> 503,53 -> 503,60 -> 505,60 -> 505,53 -> 505,60 -> 507,60 -> 507,52 -> 507,60 -> 509,60 -> 509,53 -> 509,60 -> 511,60 -> 511,58 -> 511,60
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491,73 -> 491,63 -> 491,73 -> 493,73 -> 493,65 -> 493,73 -> 495,73 -> 495,68 -> 495,73 -> 497,73 -> 497,67 -> 497,73 -> 499,73 -> 499,68 -> 499,73
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498,17 -> 502,17
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489,19 -> 493,19
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479,34 -> 479,32 -> 479,34 -> 481,34 -> 481,30 -> 481,34 -> 483,34 -> 483,26 -> 483,34 -> 485,34 -> 485,25 -> 485,34 -> 487,34 -> 487,26 -> 487,34 -> 489,34 -> 489,32 -> 489,34
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497,60 -> 497,59 -> 497,60 -> 499,60 -> 499,55 -> 499,60 -> 501,60 -> 501,54 -> 501,60 -> 503,60 -> 503,53 -> 503,60 -> 505,60 -> 505,53 -> 505,60 -> 507,60 -> 507,52 -> 507,60 -> 509,60 -> 509,53 -> 509,60 -> 511,60 -> 511,58 -> 511,60
62+
497,76 -> 497,80 -> 494,80 -> 494,86 -> 508,86 -> 508,80 -> 503,80 -> 503,76
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525,120 -> 525,122 -> 522,122 -> 522,130 -> 535,130 -> 535,122 -> 531,122 -> 531,120
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545,146 -> 545,150 -> 537,150 -> 537,156 -> 551,156 -> 551,150 -> 548,150 -> 548,146
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479,34 -> 479,32 -> 479,34 -> 481,34 -> 481,30 -> 481,34 -> 483,34 -> 483,26 -> 483,34 -> 485,34 -> 485,25 -> 485,34 -> 487,34 -> 487,26 -> 487,34 -> 489,34 -> 489,32 -> 489,34
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491,73 -> 491,63 -> 491,73 -> 493,73 -> 493,65 -> 493,73 -> 495,73 -> 495,68 -> 495,73 -> 497,73 -> 497,67 -> 497,73 -> 499,73 -> 499,68 -> 499,73
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497,60 -> 497,59 -> 497,60 -> 499,60 -> 499,55 -> 499,60 -> 501,60 -> 501,54 -> 501,60 -> 503,60 -> 503,53 -> 503,60 -> 505,60 -> 505,53 -> 505,60 -> 507,60 -> 507,52 -> 507,60 -> 509,60 -> 509,53 -> 509,60 -> 511,60 -> 511,58 -> 511,60
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491,73 -> 491,63 -> 491,73 -> 493,73 -> 493,65 -> 493,73 -> 495,73 -> 495,68 -> 495,73 -> 497,73 -> 497,67 -> 497,73 -> 499,73 -> 499,68 -> 499,73
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479,34 -> 479,32 -> 479,34 -> 481,34 -> 481,30 -> 481,34 -> 483,34 -> 483,26 -> 483,34 -> 485,34 -> 485,25 -> 485,34 -> 487,34 -> 487,26 -> 487,34 -> 489,34 -> 489,32 -> 489,34
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537,139 -> 537,140 -> 548,140 -> 548,139
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537,139 -> 537,140 -> 548,140 -> 548,139
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497,60 -> 497,59 -> 497,60 -> 499,60 -> 499,55 -> 499,60 -> 501,60 -> 501,54 -> 501,60 -> 503,60 -> 503,53 -> 503,60 -> 505,60 -> 505,53 -> 505,60 -> 507,60 -> 507,52 -> 507,60 -> 509,60 -> 509,53 -> 509,60 -> 511,60 -> 511,58 -> 511,60
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479,34 -> 479,32 -> 479,34 -> 481,34 -> 481,30 -> 481,34 -> 483,34 -> 483,26 -> 483,34 -> 485,34 -> 485,25 -> 485,34 -> 487,34 -> 487,26 -> 487,34 -> 489,34 -> 489,32 -> 489,34
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497,76 -> 497,80 -> 494,80 -> 494,86 -> 508,86 -> 508,80 -> 503,80 -> 503,76
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498,21 -> 502,21
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514,110 -> 514,103 -> 514,110 -> 516,110 -> 516,101 -> 516,110 -> 518,110 -> 518,105 -> 518,110
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545,146 -> 545,150 -> 537,150 -> 537,156 -> 551,156 -> 551,150 -> 548,150 -> 548,146
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517,113 -> 521,113
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534,133 -> 538,133
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545,146 -> 545,150 -> 537,150 -> 537,156 -> 551,156 -> 551,150 -> 548,150 -> 548,146
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491,73 -> 491,63 -> 491,73 -> 493,73 -> 493,65 -> 493,73 -> 495,73 -> 495,68 -> 495,73 -> 497,73 -> 497,67 -> 497,73 -> 499,73 -> 499,68 -> 499,73
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479,34 -> 479,32 -> 479,34 -> 481,34 -> 481,30 -> 481,34 -> 483,34 -> 483,26 -> 483,34 -> 485,34 -> 485,25 -> 485,34 -> 487,34 -> 487,26 -> 487,34 -> 489,34 -> 489,32 -> 489,34
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507,19 -> 511,19
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497,60 -> 497,59 -> 497,60 -> 499,60 -> 499,55 -> 499,60 -> 501,60 -> 501,54 -> 501,60 -> 503,60 -> 503,53 -> 503,60 -> 505,60 -> 505,53 -> 505,60 -> 507,60 -> 507,52 -> 507,60 -> 509,60 -> 509,53 -> 509,60 -> 511,60 -> 511,58 -> 511,60
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517,117 -> 521,117
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504,17 -> 508,17
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514,110 -> 514,103 -> 514,110 -> 516,110 -> 516,101 -> 516,110 -> 518,110 -> 518,105 -> 518,110
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487,41 -> 492,41
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507,89 -> 507,93 -> 499,93 -> 499,97 -> 516,97 -> 516,93 -> 510,93 -> 510,89
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479,34 -> 479,32 -> 479,34 -> 481,34 -> 481,30 -> 481,34 -> 483,34 -> 483,26 -> 483,34 -> 485,34 -> 485,25 -> 485,34 -> 487,34 -> 487,26 -> 487,34 -> 489,34 -> 489,32 -> 489,34
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497,60 -> 497,59 -> 497,60 -> 499,60 -> 499,55 -> 499,60 -> 501,60 -> 501,54 -> 501,60 -> 503,60 -> 503,53 -> 503,60 -> 505,60 -> 505,53 -> 505,60 -> 507,60 -> 507,52 -> 507,60 -> 509,60 -> 509,53 -> 509,60 -> 511,60 -> 511,58 -> 511,60
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507,89 -> 507,93 -> 499,93 -> 499,97 -> 516,97 -> 516,93 -> 510,93 -> 510,89
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478,47 -> 483,47
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491,73 -> 491,63 -> 491,73 -> 493,73 -> 493,65 -> 493,73 -> 495,73 -> 495,68 -> 495,73 -> 497,73 -> 497,67 -> 497,73 -> 499,73 -> 499,68 -> 499,73
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491,73 -> 491,63 -> 491,73 -> 493,73 -> 493,65 -> 493,73 -> 495,73 -> 495,68 -> 495,73 -> 497,73 -> 497,67 -> 497,73 -> 499,73 -> 499,68 -> 499,73
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497,60 -> 497,59 -> 497,60 -> 499,60 -> 499,55 -> 499,60 -> 501,60 -> 501,54 -> 501,60 -> 503,60 -> 503,53 -> 503,60 -> 505,60 -> 505,53 -> 505,60 -> 507,60 -> 507,52 -> 507,60 -> 509,60 -> 509,53 -> 509,60 -> 511,60 -> 511,58 -> 511,60
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492,47 -> 497,47
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545,146 -> 545,150 -> 537,150 -> 537,156 -> 551,156 -> 551,150 -> 548,150 -> 548,146
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488,45 -> 493,45
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525,120 -> 525,122 -> 522,122 -> 522,130 -> 535,130 -> 535,122 -> 531,122 -> 531,120
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491,43 -> 496,43
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514,110 -> 514,103 -> 514,110 -> 516,110 -> 516,101 -> 516,110 -> 518,110 -> 518,105 -> 518,110
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507,89 -> 507,93 -> 499,93 -> 499,97 -> 516,97 -> 516,93 -> 510,93 -> 510,89
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486,21 -> 490,21
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497,60 -> 497,59 -> 497,60 -> 499,60 -> 499,55 -> 499,60 -> 501,60 -> 501,54 -> 501,60 -> 503,60 -> 503,53 -> 503,60 -> 505,60 -> 505,53 -> 505,60 -> 507,60 -> 507,52 -> 507,60 -> 509,60 -> 509,53 -> 509,60 -> 511,60 -> 511,58 -> 511,60
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537,135 -> 541,135
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479,34 -> 479,32 -> 479,34 -> 481,34 -> 481,30 -> 481,34 -> 483,34 -> 483,26 -> 483,34 -> 485,34 -> 485,25 -> 485,34 -> 487,34 -> 487,26 -> 487,34 -> 489,34 -> 489,32 -> 489,34
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491,73 -> 491,63 -> 491,73 -> 493,73 -> 493,65 -> 493,73 -> 495,73 -> 495,68 -> 495,73 -> 497,73 -> 497,67 -> 497,73 -> 499,73 -> 499,68 -> 499,73
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491,73 -> 491,63 -> 491,73 -> 493,73 -> 493,65 -> 493,73 -> 495,73 -> 495,68 -> 495,73 -> 497,73 -> 497,67 -> 497,73 -> 499,73 -> 499,68 -> 499,73
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531,135 -> 535,135
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497,76 -> 497,80 -> 494,80 -> 494,86 -> 508,86 -> 508,80 -> 503,80 -> 503,76
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507,89 -> 507,93 -> 499,93 -> 499,97 -> 516,97 -> 516,93 -> 510,93 -> 510,89
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499,47 -> 504,47
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507,89 -> 507,93 -> 499,93 -> 499,97 -> 516,97 -> 516,93 -> 510,93 -> 510,89
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514,110 -> 514,103 -> 514,110 -> 516,110 -> 516,101 -> 516,110 -> 518,110 -> 518,105 -> 518,110
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479,34 -> 479,32 -> 479,34 -> 481,34 -> 481,30 -> 481,34 -> 483,34 -> 483,26 -> 483,34 -> 485,34 -> 485,25 -> 485,34 -> 487,34 -> 487,26 -> 487,34 -> 489,34 -> 489,32 -> 489,34
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479,34 -> 479,32 -> 479,34 -> 481,34 -> 481,30 -> 481,34 -> 483,34 -> 483,26 -> 483,34 -> 485,34 -> 485,25 -> 485,34 -> 487,34 -> 487,26 -> 487,34 -> 489,34 -> 489,32 -> 489,34
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497,76 -> 497,80 -> 494,80 -> 494,86 -> 508,86 -> 508,80 -> 503,80 -> 503,76
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501,19 -> 505,19
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495,45 -> 500,45
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540,137 -> 544,137
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520,115 -> 524,115
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510,21 -> 514,21
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485,47 -> 490,47
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491,73 -> 491,63 -> 491,73 -> 493,73 -> 493,65 -> 493,73 -> 495,73 -> 495,68 -> 495,73 -> 497,73 -> 497,67 -> 497,73 -> 499,73 -> 499,68 -> 499,73
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507,89 -> 507,93 -> 499,93 -> 499,97 -> 516,97 -> 516,93 -> 510,93 -> 510,89
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491,73 -> 491,63 -> 491,73 -> 493,73 -> 493,65 -> 493,73 -> 495,73 -> 495,68 -> 495,73 -> 497,73 -> 497,67 -> 497,73 -> 499,73 -> 499,68 -> 499,73
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548,160 -> 548,161 -> 561,161 -> 561,160
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497,60 -> 497,59 -> 497,60 -> 499,60 -> 499,55 -> 499,60 -> 501,60 -> 501,54 -> 501,60 -> 503,60 -> 503,53 -> 503,60 -> 505,60 -> 505,53 -> 505,60 -> 507,60 -> 507,52 -> 507,60 -> 509,60 -> 509,53 -> 509,60 -> 511,60 -> 511,58 -> 511,60
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495,19 -> 499,19
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514,115 -> 518,115
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507,89 -> 507,93 -> 499,93 -> 499,97 -> 516,97 -> 516,93 -> 510,93 -> 510,89
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497,60 -> 497,59 -> 497,60 -> 499,60 -> 499,55 -> 499,60 -> 501,60 -> 501,54 -> 501,60 -> 503,60 -> 503,53 -> 503,60 -> 505,60 -> 505,53 -> 505,60 -> 507,60 -> 507,52 -> 507,60 -> 509,60 -> 509,53 -> 509,60 -> 511,60 -> 511,58 -> 511,60
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479,34 -> 479,32 -> 479,34 -> 481,34 -> 481,30 -> 481,34 -> 483,34 -> 483,26 -> 483,34 -> 485,34 -> 485,25 -> 485,34 -> 487,34 -> 487,26 -> 487,34 -> 489,34 -> 489,32 -> 489,34
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497,60 -> 497,59 -> 497,60 -> 499,60 -> 499,55 -> 499,60 -> 501,60 -> 501,54 -> 501,60 -> 503,60 -> 503,53 -> 503,60 -> 505,60 -> 505,53 -> 505,60 -> 507,60 -> 507,52 -> 507,60 -> 509,60 -> 509,53 -> 509,60 -> 511,60 -> 511,58 -> 511,60
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528,137 -> 532,137
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545,146 -> 545,150 -> 537,150 -> 537,156 -> 551,156 -> 551,150 -> 548,150 -> 548,146

‎day14/part1.rkt

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#lang racket
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(require "../aoc.rkt")
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(define (line->points line)
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(map (compose (curry map string->number) (curryr string-split ",")) (string-split line " -> " )))
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(define (addrange p points)
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(let ([ax (first (first points))]
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[ay (second (first points))]
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[bx (+ 1 (first p))]
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[by (+ 1 (second p))])
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(for/fold ([points points]) ([x (range ax bx)][y (range ay by)])
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(cons (list x y) points))))
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(define (expand points)
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(foldl addrange (list (first points)) points))
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(define (add2cave points cave)
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(foldl (lambda (p h) (hash-set h p "#")) (hash) points))
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(define (solve lines)
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(let* ([endpoints (map line->points lines)]
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[points (map expand endpoints)]
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[cave (foldl add2cave (hash) (insp points))])
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cave))
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(call-with-lines "input" solve)

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