falling falling falling
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--- Day 14: Regolith Reservoir ---
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The distress signal leads you to a giant waterfall! Actually, hang on - the signal seems like it's coming from the waterfall itself, and that doesn't make any sense. However, you do notice a little path that leads behind the waterfall.
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Correction: the distress signal leads you behind a giant waterfall! There seems to be a large cave system here, and the signal definitely leads further inside.
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As you begin to make your way deeper underground, you feel the ground rumble for a moment. Sand begins pouring into the cave! If you don't quickly figure out where the sand is going, you could quickly become trapped!
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Fortunately, your familiarity with analyzing the path of falling material will come in handy here. You scan a two-dimensional vertical slice of the cave above you (your puzzle input) and discover that it is mostly air with structures made of rock.
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Your scan traces the path of each solid rock structure and reports the x,y coordinates that form the shape of the path, where x represents distance to the right and y represents distance down. Each path appears as a single line of text in your scan. After the first point of each path, each point indicates the end of a straight horizontal or vertical line to be drawn from the previous point. For example:
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498,4 -> 498,6 -> 496,6
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503,4 -> 502,4 -> 502,9 -> 494,9
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This scan means that there are two paths of rock; the first path consists of two straight lines, and the second path consists of three straight lines. (Specifically, the first path consists of a line of rock from 498,4 through 498,6 and another line of rock from 498,6 through 496,6.)
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The sand is pouring into the cave from point 500,0.
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Drawing rock as #, air as ., and the source of the sand as +, this becomes:
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4 5 5
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9 0 0
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4 0 3
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0 ......+...
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1 ..........
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2 ..........
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3 ..........
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4 ....#...##
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5 ....#...#.
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6 ..###...#.
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7 ........#.
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8 ........#.
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9 #########.
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Sand is produced one unit at a time, and the next unit of sand is not produced until the previous unit of sand comes to rest. A unit of sand is large enough to fill one tile of air in your scan.
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A unit of sand always falls down one step if possible. If the tile immediately below is blocked (by rock or sand), the unit of sand attempts to instead move diagonally one step down and to the left. If that tile is blocked, the unit of sand attempts to instead move diagonally one step down and to the right. Sand keeps moving as long as it is able to do so, at each step trying to move down, then down-left, then down-right. If all three possible destinations are blocked, the unit of sand comes to rest and no longer moves, at which point the next unit of sand is created back at the source.
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So, drawing sand that has come to rest as o, the first unit of sand simply falls straight down and then stops:
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......+...
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..........
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..........
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..........
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....#...##
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....#...#.
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..###...#.
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........#.
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......o.#.
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#########.
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The second unit of sand then falls straight down, lands on the first one, and then comes to rest to its left:
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......+...
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..........
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..........
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..........
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....#...##
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....#...#.
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..###...#.
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........#.
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.....oo.#.
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#########.
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After a total of five units of sand have come to rest, they form this pattern:
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......+...
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..........
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..........
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..........
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....#...##
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....#...#.
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..###...#.
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......o.#.
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....oooo#.
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#########.
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After a total of 22 units of sand:
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......+...
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..........
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......o...
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.....ooo..
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....#ooo##
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....#ooo#.
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..###ooo#.
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....oooo#.
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...ooooo#.
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#########.
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Finally, only two more units of sand can possibly come to rest:
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......+...
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..........
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......o...
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.....ooo..
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....#ooo##
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...o#ooo#.
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..###ooo#.
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....oooo#.
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.o.ooooo#.
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#########.
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Once all 24 units of sand shown above have come to rest, all further sand flows out the bottom, falling into the endless void. Just for fun, the path any new sand takes before falling forever is shown here with ~:
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.......+...
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.......~...
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......~o...
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.....~ooo..
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....~#ooo##
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...~o#ooo#.
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..~###ooo#.
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..~..oooo#.
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.~o.ooooo#.
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~#########.
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~..........
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~..........
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~..........
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Using your scan, simulate the falling sand. How many units of sand come to rest before sand starts flowing into the abyss below?
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Your puzzle answer was 1298.
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--- Part Two ---
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You realize you misread the scan. There isn't an endless void at the bottom of the scan - there's floor, and you're standing on it!
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You don't have time to scan the floor, so assume the floor is an infinite horizontal line with a y coordinate equal to two plus the highest y coordinate of any point in your scan.
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In the example above, the highest y coordinate of any point is 9, and so the floor is at y=11. (This is as if your scan contained one extra rock path like -infinity,11 -> infinity,11.) With the added floor, the example above now looks like this:
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...........+........
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....................
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....................
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....................
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.........#...##.....
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.........#...#......
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.......###...#......
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.............#......
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.............#......
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.....#########......
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....................
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<-- etc #################### etc -->
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To find somewhere safe to stand, you'll need to simulate falling sand until a unit of sand comes to rest at 500,0, blocking the source entirely and stopping the flow of sand into the cave. In the example above, the situation finally looks like this after 93 units of sand come to rest:
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............o............
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...........ooo...........
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..........ooooo..........
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.........ooooooo.........
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........oo#ooo##o........
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.......ooo#ooo#ooo.......
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......oo###ooo#oooo......
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.....oooo.oooo#ooooo.....
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....oooooooooo#oooooo....
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...ooo#########ooooooo...
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..ooooo.......ooooooooo..
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#########################
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Using your scan, simulate the falling sand until the source of the sand becomes blocked. How many units of sand come to rest?
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Your puzzle answer was 25585.
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@ -0,0 +1,163 @@
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470,56 -> 470,54 -> 470,56 -> 472,56 -> 472,46 -> 472,56 -> 474,56 -> 474,49 -> 474,56 -> 476,56 -> 476,49 -> 476,56 -> 478,56 -> 478,54 -> 478,56 -> 480,56 -> 480,46 -> 480,56 -> 482,56 -> 482,52 -> 482,56 -> 484,56 -> 484,53 -> 484,56 -> 486,56 -> 486,47 -> 486,56
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432,82 -> 450,82 -> 450,81
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466,59 -> 466,61 -> 461,61 -> 461,66 -> 480,66 -> 480,61 -> 472,61 -> 472,59
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406,118 -> 406,110 -> 406,118 -> 408,118 -> 408,115 -> 408,118 -> 410,118 -> 410,115 -> 410,118 -> 412,118 -> 412,110 -> 412,118 -> 414,118 -> 414,111 -> 414,118 -> 416,118 -> 416,114 -> 416,118 -> 418,118 -> 418,110 -> 418,118
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427,88 -> 427,92 -> 423,92 -> 423,98 -> 440,98 -> 440,92 -> 432,92 -> 432,88
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480,42 -> 480,43 -> 489,43 -> 489,42
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489,28 -> 489,31 -> 484,31 -> 484,37 -> 500,37 -> 500,31 -> 492,31 -> 492,28
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406,118 -> 406,110 -> 406,118 -> 408,118 -> 408,115 -> 408,118 -> 410,118 -> 410,115 -> 410,118 -> 412,118 -> 412,110 -> 412,118 -> 414,118 -> 414,111 -> 414,118 -> 416,118 -> 416,114 -> 416,118 -> 418,118 -> 418,110 -> 418,118
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406,118 -> 406,110 -> 406,118 -> 408,118 -> 408,115 -> 408,118 -> 410,118 -> 410,115 -> 410,118 -> 412,118 -> 412,110 -> 412,118 -> 414,118 -> 414,111 -> 414,118 -> 416,118 -> 416,114 -> 416,118 -> 418,118 -> 418,110 -> 418,118
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403,121 -> 403,125 -> 395,125 -> 395,130 -> 412,130 -> 412,125 -> 406,125 -> 406,121
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378,152 -> 378,147 -> 378,152 -> 380,152 -> 380,148 -> 380,152 -> 382,152 -> 382,145 -> 382,152 -> 384,152 -> 384,145 -> 384,152 -> 386,152 -> 386,147 -> 386,152 -> 388,152 -> 388,151 -> 388,152 -> 390,152 -> 390,144 -> 390,152
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470,56 -> 470,54 -> 470,56 -> 472,56 -> 472,46 -> 472,56 -> 474,56 -> 474,49 -> 474,56 -> 476,56 -> 476,49 -> 476,56 -> 478,56 -> 478,54 -> 478,56 -> 480,56 -> 480,46 -> 480,56 -> 482,56 -> 482,52 -> 482,56 -> 484,56 -> 484,53 -> 484,56 -> 486,56 -> 486,47 -> 486,56
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414,105 -> 418,105
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406,118 -> 406,110 -> 406,118 -> 408,118 -> 408,115 -> 408,118 -> 410,118 -> 410,115 -> 410,118 -> 412,118 -> 412,110 -> 412,118 -> 414,118 -> 414,111 -> 414,118 -> 416,118 -> 416,114 -> 416,118 -> 418,118 -> 418,110 -> 418,118
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368,165 -> 368,164 -> 368,165 -> 370,165 -> 370,164 -> 370,165 -> 372,165 -> 372,163 -> 372,165 -> 374,165 -> 374,161 -> 374,165 -> 376,165 -> 376,157 -> 376,165 -> 378,165 -> 378,164 -> 378,165 -> 380,165 -> 380,162 -> 380,165 -> 382,165 -> 382,163 -> 382,165 -> 384,165 -> 384,158 -> 384,165
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427,88 -> 427,92 -> 423,92 -> 423,98 -> 440,98 -> 440,92 -> 432,92 -> 432,88
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378,152 -> 378,147 -> 378,152 -> 380,152 -> 380,148 -> 380,152 -> 382,152 -> 382,145 -> 382,152 -> 384,152 -> 384,145 -> 384,152 -> 386,152 -> 386,147 -> 386,152 -> 388,152 -> 388,151 -> 388,152 -> 390,152 -> 390,144 -> 390,152
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470,56 -> 470,54 -> 470,56 -> 472,56 -> 472,46 -> 472,56 -> 474,56 -> 474,49 -> 474,56 -> 476,56 -> 476,49 -> 476,56 -> 478,56 -> 478,54 -> 478,56 -> 480,56 -> 480,46 -> 480,56 -> 482,56 -> 482,52 -> 482,56 -> 484,56 -> 484,53 -> 484,56 -> 486,56 -> 486,47 -> 486,56
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466,59 -> 466,61 -> 461,61 -> 461,66 -> 480,66 -> 480,61 -> 472,61 -> 472,59
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368,165 -> 368,164 -> 368,165 -> 370,165 -> 370,164 -> 370,165 -> 372,165 -> 372,163 -> 372,165 -> 374,165 -> 374,161 -> 374,165 -> 376,165 -> 376,157 -> 376,165 -> 378,165 -> 378,164 -> 378,165 -> 380,165 -> 380,162 -> 380,165 -> 382,165 -> 382,163 -> 382,165 -> 384,165 -> 384,158 -> 384,165
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368,165 -> 368,164 -> 368,165 -> 370,165 -> 370,164 -> 370,165 -> 372,165 -> 372,163 -> 372,165 -> 374,165 -> 374,161 -> 374,165 -> 376,165 -> 376,157 -> 376,165 -> 378,165 -> 378,164 -> 378,165 -> 380,165 -> 380,162 -> 380,165 -> 382,165 -> 382,163 -> 382,165 -> 384,165 -> 384,158 -> 384,165
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489,28 -> 489,31 -> 484,31 -> 484,37 -> 500,37 -> 500,31 -> 492,31 -> 492,28
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378,152 -> 378,147 -> 378,152 -> 380,152 -> 380,148 -> 380,152 -> 382,152 -> 382,145 -> 382,152 -> 384,152 -> 384,145 -> 384,152 -> 386,152 -> 386,147 -> 386,152 -> 388,152 -> 388,151 -> 388,152 -> 390,152 -> 390,144 -> 390,152
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491,19 -> 496,19
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368,165 -> 368,164 -> 368,165 -> 370,165 -> 370,164 -> 370,165 -> 372,165 -> 372,163 -> 372,165 -> 374,165 -> 374,161 -> 374,165 -> 376,165 -> 376,157 -> 376,165 -> 378,165 -> 378,164 -> 378,165 -> 380,165 -> 380,162 -> 380,165 -> 382,165 -> 382,163 -> 382,165 -> 384,165 -> 384,158 -> 384,165
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368,165 -> 368,164 -> 368,165 -> 370,165 -> 370,164 -> 370,165 -> 372,165 -> 372,163 -> 372,165 -> 374,165 -> 374,161 -> 374,165 -> 376,165 -> 376,157 -> 376,165 -> 378,165 -> 378,164 -> 378,165 -> 380,165 -> 380,162 -> 380,165 -> 382,165 -> 382,163 -> 382,165 -> 384,165 -> 384,158 -> 384,165
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427,88 -> 427,92 -> 423,92 -> 423,98 -> 440,98 -> 440,92 -> 432,92 -> 432,88
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378,152 -> 378,147 -> 378,152 -> 380,152 -> 380,148 -> 380,152 -> 382,152 -> 382,145 -> 382,152 -> 384,152 -> 384,145 -> 384,152 -> 386,152 -> 386,147 -> 386,152 -> 388,152 -> 388,151 -> 388,152 -> 390,152 -> 390,144 -> 390,152
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406,118 -> 406,110 -> 406,118 -> 408,118 -> 408,115 -> 408,118 -> 410,118 -> 410,115 -> 410,118 -> 412,118 -> 412,110 -> 412,118 -> 414,118 -> 414,111 -> 414,118 -> 416,118 -> 416,114 -> 416,118 -> 418,118 -> 418,110 -> 418,118
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449,74 -> 453,74
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406,118 -> 406,110 -> 406,118 -> 408,118 -> 408,115 -> 408,118 -> 410,118 -> 410,115 -> 410,118 -> 412,118 -> 412,110 -> 412,118 -> 414,118 -> 414,111 -> 414,118 -> 416,118 -> 416,114 -> 416,118 -> 418,118 -> 418,110 -> 418,118
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470,56 -> 470,54 -> 470,56 -> 472,56 -> 472,46 -> 472,56 -> 474,56 -> 474,49 -> 474,56 -> 476,56 -> 476,49 -> 476,56 -> 478,56 -> 478,54 -> 478,56 -> 480,56 -> 480,46 -> 480,56 -> 482,56 -> 482,52 -> 482,56 -> 484,56 -> 484,53 -> 484,56 -> 486,56 -> 486,47 -> 486,56
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513,25 -> 518,25
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368,165 -> 368,164 -> 368,165 -> 370,165 -> 370,164 -> 370,165 -> 372,165 -> 372,163 -> 372,165 -> 374,165 -> 374,161 -> 374,165 -> 376,165 -> 376,157 -> 376,165 -> 378,165 -> 378,164 -> 378,165 -> 380,165 -> 380,162 -> 380,165 -> 382,165 -> 382,163 -> 382,165 -> 384,165 -> 384,158 -> 384,165
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470,56 -> 470,54 -> 470,56 -> 472,56 -> 472,46 -> 472,56 -> 474,56 -> 474,49 -> 474,56 -> 476,56 -> 476,49 -> 476,56 -> 478,56 -> 478,54 -> 478,56 -> 480,56 -> 480,46 -> 480,56 -> 482,56 -> 482,52 -> 482,56 -> 484,56 -> 484,53 -> 484,56 -> 486,56 -> 486,47 -> 486,56
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406,118 -> 406,110 -> 406,118 -> 408,118 -> 408,115 -> 408,118 -> 410,118 -> 410,115 -> 410,118 -> 412,118 -> 412,110 -> 412,118 -> 414,118 -> 414,111 -> 414,118 -> 416,118 -> 416,114 -> 416,118 -> 418,118 -> 418,110 -> 418,118
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427,88 -> 427,92 -> 423,92 -> 423,98 -> 440,98 -> 440,92 -> 432,92 -> 432,88
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368,165 -> 368,164 -> 368,165 -> 370,165 -> 370,164 -> 370,165 -> 372,165 -> 372,163 -> 372,165 -> 374,165 -> 374,161 -> 374,165 -> 376,165 -> 376,157 -> 376,165 -> 378,165 -> 378,164 -> 378,165 -> 380,165 -> 380,162 -> 380,165 -> 382,165 -> 382,163 -> 382,165 -> 384,165 -> 384,158 -> 384,165
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378,152 -> 378,147 -> 378,152 -> 380,152 -> 380,148 -> 380,152 -> 382,152 -> 382,145 -> 382,152 -> 384,152 -> 384,145 -> 384,152 -> 386,152 -> 386,147 -> 386,152 -> 388,152 -> 388,151 -> 388,152 -> 390,152 -> 390,144 -> 390,152
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480,42 -> 480,43 -> 489,43 -> 489,42
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403,121 -> 403,125 -> 395,125 -> 395,130 -> 412,130 -> 412,125 -> 406,125 -> 406,121
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378,152 -> 378,147 -> 378,152 -> 380,152 -> 380,148 -> 380,152 -> 382,152 -> 382,145 -> 382,152 -> 384,152 -> 384,145 -> 384,152 -> 386,152 -> 386,147 -> 386,152 -> 388,152 -> 388,151 -> 388,152 -> 390,152 -> 390,144 -> 390,152
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498,19 -> 503,19
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368,165 -> 368,164 -> 368,165 -> 370,165 -> 370,164 -> 370,165 -> 372,165 -> 372,163 -> 372,165 -> 374,165 -> 374,161 -> 374,165 -> 376,165 -> 376,157 -> 376,165 -> 378,165 -> 378,164 -> 378,165 -> 380,165 -> 380,162 -> 380,165 -> 382,165 -> 382,163 -> 382,165 -> 384,165 -> 384,158 -> 384,165
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466,59 -> 466,61 -> 461,61 -> 461,66 -> 480,66 -> 480,61 -> 472,61 -> 472,59
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378,152 -> 378,147 -> 378,152 -> 380,152 -> 380,148 -> 380,152 -> 382,152 -> 382,145 -> 382,152 -> 384,152 -> 384,145 -> 384,152 -> 386,152 -> 386,147 -> 386,152 -> 388,152 -> 388,151 -> 388,152 -> 390,152 -> 390,144 -> 390,152
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502,22 -> 507,22
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378,152 -> 378,147 -> 378,152 -> 380,152 -> 380,148 -> 380,152 -> 382,152 -> 382,145 -> 382,152 -> 384,152 -> 384,145 -> 384,152 -> 386,152 -> 386,147 -> 386,152 -> 388,152 -> 388,151 -> 388,152 -> 390,152 -> 390,144 -> 390,152
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403,121 -> 403,125 -> 395,125 -> 395,130 -> 412,130 -> 412,125 -> 406,125 -> 406,121
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509,22 -> 514,22
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506,25 -> 511,25
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470,56 -> 470,54 -> 470,56 -> 472,56 -> 472,46 -> 472,56 -> 474,56 -> 474,49 -> 474,56 -> 476,56 -> 476,49 -> 476,56 -> 478,56 -> 478,54 -> 478,56 -> 480,56 -> 480,46 -> 480,56 -> 482,56 -> 482,52 -> 482,56 -> 484,56 -> 484,53 -> 484,56 -> 486,56 -> 486,47 -> 486,56
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427,88 -> 427,92 -> 423,92 -> 423,98 -> 440,98 -> 440,92 -> 432,92 -> 432,88
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499,25 -> 504,25
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505,19 -> 510,19
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495,22 -> 500,22
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443,78 -> 447,78
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368,165 -> 368,164 -> 368,165 -> 370,165 -> 370,164 -> 370,165 -> 372,165 -> 372,163 -> 372,165 -> 374,165 -> 374,161 -> 374,165 -> 376,165 -> 376,157 -> 376,165 -> 378,165 -> 378,164 -> 378,165 -> 380,165 -> 380,162 -> 380,165 -> 382,165 -> 382,163 -> 382,165 -> 384,165 -> 384,158 -> 384,165
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406,118 -> 406,110 -> 406,118 -> 408,118 -> 408,115 -> 408,118 -> 410,118 -> 410,115 -> 410,118 -> 412,118 -> 412,110 -> 412,118 -> 414,118 -> 414,111 -> 414,118 -> 416,118 -> 416,114 -> 416,118 -> 418,118 -> 418,110 -> 418,118
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368,165 -> 368,164 -> 368,165 -> 370,165 -> 370,164 -> 370,165 -> 372,165 -> 372,163 -> 372,165 -> 374,165 -> 374,161 -> 374,165 -> 376,165 -> 376,157 -> 376,165 -> 378,165 -> 378,164 -> 378,165 -> 380,165 -> 380,162 -> 380,165 -> 382,165 -> 382,163 -> 382,165 -> 384,165 -> 384,158 -> 384,165
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470,56 -> 470,54 -> 470,56 -> 472,56 -> 472,46 -> 472,56 -> 474,56 -> 474,49 -> 474,56 -> 476,56 -> 476,49 -> 476,56 -> 478,56 -> 478,54 -> 478,56 -> 480,56 -> 480,46 -> 480,56 -> 482,56 -> 482,52 -> 482,56 -> 484,56 -> 484,53 -> 484,56 -> 486,56 -> 486,47 -> 486,56
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403,121 -> 403,125 -> 395,125 -> 395,130 -> 412,130 -> 412,125 -> 406,125 -> 406,121
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406,118 -> 406,110 -> 406,118 -> 408,118 -> 408,115 -> 408,118 -> 410,118 -> 410,115 -> 410,118 -> 412,118 -> 412,110 -> 412,118 -> 414,118 -> 414,111 -> 414,118 -> 416,118 -> 416,114 -> 416,118 -> 418,118 -> 418,110 -> 418,118
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488,22 -> 493,22
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417,103 -> 421,103
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403,121 -> 403,125 -> 395,125 -> 395,130 -> 412,130 -> 412,125 -> 406,125 -> 406,121
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494,16 -> 499,16
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368,165 -> 368,164 -> 368,165 -> 370,165 -> 370,164 -> 370,165 -> 372,165 -> 372,163 -> 372,165 -> 374,165 -> 374,161 -> 374,165 -> 376,165 -> 376,157 -> 376,165 -> 378,165 -> 378,164 -> 378,165 -> 380,165 -> 380,162 -> 380,165 -> 382,165 -> 382,163 -> 382,165 -> 384,165 -> 384,158 -> 384,165
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446,76 -> 450,76
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489,28 -> 489,31 -> 484,31 -> 484,37 -> 500,37 -> 500,31 -> 492,31 -> 492,28
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406,118 -> 406,110 -> 406,118 -> 408,118 -> 408,115 -> 408,118 -> 410,118 -> 410,115 -> 410,118 -> 412,118 -> 412,110 -> 412,118 -> 414,118 -> 414,111 -> 414,118 -> 416,118 -> 416,114 -> 416,118 -> 418,118 -> 418,110 -> 418,118
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470,56 -> 470,54 -> 470,56 -> 472,56 -> 472,46 -> 472,56 -> 474,56 -> 474,49 -> 474,56 -> 476,56 -> 476,49 -> 476,56 -> 478,56 -> 478,54 -> 478,56 -> 480,56 -> 480,46 -> 480,56 -> 482,56 -> 482,52 -> 482,56 -> 484,56 -> 484,53 -> 484,56 -> 486,56 -> 486,47 -> 486,56
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378,152 -> 378,147 -> 378,152 -> 380,152 -> 380,148 -> 380,152 -> 382,152 -> 382,145 -> 382,152 -> 384,152 -> 384,145 -> 384,152 -> 386,152 -> 386,147 -> 386,152 -> 388,152 -> 388,151 -> 388,152 -> 390,152 -> 390,144 -> 390,152
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470,56 -> 470,54 -> 470,56 -> 472,56 -> 472,46 -> 472,56 -> 474,56 -> 474,49 -> 474,56 -> 476,56 -> 476,49 -> 476,56 -> 478,56 -> 478,54 -> 478,56 -> 480,56 -> 480,46 -> 480,56 -> 482,56 -> 482,52 -> 482,56 -> 484,56 -> 484,53 -> 484,56 -> 486,56 -> 486,47 -> 486,56
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378,152 -> 378,147 -> 378,152 -> 380,152 -> 380,148 -> 380,152 -> 382,152 -> 382,145 -> 382,152 -> 384,152 -> 384,145 -> 384,152 -> 386,152 -> 386,147 -> 386,152 -> 388,152 -> 388,151 -> 388,152 -> 390,152 -> 390,144 -> 390,152
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466,59 -> 466,61 -> 461,61 -> 461,66 -> 480,66 -> 480,61 -> 472,61 -> 472,59
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470,56 -> 470,54 -> 470,56 -> 472,56 -> 472,46 -> 472,56 -> 474,56 -> 474,49 -> 474,56 -> 476,56 -> 476,49 -> 476,56 -> 478,56 -> 478,54 -> 478,56 -> 480,56 -> 480,46 -> 480,56 -> 482,56 -> 482,52 -> 482,56 -> 484,56 -> 484,53 -> 484,56 -> 486,56 -> 486,47 -> 486,56
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501,16 -> 506,16
|
||||
470,56 -> 470,54 -> 470,56 -> 472,56 -> 472,46 -> 472,56 -> 474,56 -> 474,49 -> 474,56 -> 476,56 -> 476,49 -> 476,56 -> 478,56 -> 478,54 -> 478,56 -> 480,56 -> 480,46 -> 480,56 -> 482,56 -> 482,52 -> 482,56 -> 484,56 -> 484,53 -> 484,56 -> 486,56 -> 486,47 -> 486,56
|
||||
368,165 -> 368,164 -> 368,165 -> 370,165 -> 370,164 -> 370,165 -> 372,165 -> 372,163 -> 372,165 -> 374,165 -> 374,161 -> 374,165 -> 376,165 -> 376,157 -> 376,165 -> 378,165 -> 378,164 -> 378,165 -> 380,165 -> 380,162 -> 380,165 -> 382,165 -> 382,163 -> 382,165 -> 384,165 -> 384,158 -> 384,165
|
||||
466,59 -> 466,61 -> 461,61 -> 461,66 -> 480,66 -> 480,61 -> 472,61 -> 472,59
|
||||
430,84 -> 430,85 -> 436,85
|
||||
426,105 -> 430,105
|
||||
452,70 -> 452,71 -> 465,71 -> 465,70
|
||||
485,25 -> 490,25
|
||||
489,28 -> 489,31 -> 484,31 -> 484,37 -> 500,37 -> 500,31 -> 492,31 -> 492,28
|
||||
368,165 -> 368,164 -> 368,165 -> 370,165 -> 370,164 -> 370,165 -> 372,165 -> 372,163 -> 372,165 -> 374,165 -> 374,161 -> 374,165 -> 376,165 -> 376,157 -> 376,165 -> 378,165 -> 378,164 -> 378,165 -> 380,165 -> 380,162 -> 380,165 -> 382,165 -> 382,163 -> 382,165 -> 384,165 -> 384,158 -> 384,165
|
||||
406,118 -> 406,110 -> 406,118 -> 408,118 -> 408,115 -> 408,118 -> 410,118 -> 410,115 -> 410,118 -> 412,118 -> 412,110 -> 412,118 -> 414,118 -> 414,111 -> 414,118 -> 416,118 -> 416,114 -> 416,118 -> 418,118 -> 418,110 -> 418,118
|
||||
406,118 -> 406,110 -> 406,118 -> 408,118 -> 408,115 -> 408,118 -> 410,118 -> 410,115 -> 410,118 -> 412,118 -> 412,110 -> 412,118 -> 414,118 -> 414,111 -> 414,118 -> 416,118 -> 416,114 -> 416,118 -> 418,118 -> 418,110 -> 418,118
|
||||
455,78 -> 459,78
|
||||
406,118 -> 406,110 -> 406,118 -> 408,118 -> 408,115 -> 408,118 -> 410,118 -> 410,115 -> 410,118 -> 412,118 -> 412,110 -> 412,118 -> 414,118 -> 414,111 -> 414,118 -> 416,118 -> 416,114 -> 416,118 -> 418,118 -> 418,110 -> 418,118
|
||||
368,165 -> 368,164 -> 368,165 -> 370,165 -> 370,164 -> 370,165 -> 372,165 -> 372,163 -> 372,165 -> 374,165 -> 374,161 -> 374,165 -> 376,165 -> 376,157 -> 376,165 -> 378,165 -> 378,164 -> 378,165 -> 380,165 -> 380,162 -> 380,165 -> 382,165 -> 382,163 -> 382,165 -> 384,165 -> 384,158 -> 384,165
|
||||
470,56 -> 470,54 -> 470,56 -> 472,56 -> 472,46 -> 472,56 -> 474,56 -> 474,49 -> 474,56 -> 476,56 -> 476,49 -> 476,56 -> 478,56 -> 478,54 -> 478,56 -> 480,56 -> 480,46 -> 480,56 -> 482,56 -> 482,52 -> 482,56 -> 484,56 -> 484,53 -> 484,56 -> 486,56 -> 486,47 -> 486,56
|
||||
466,59 -> 466,61 -> 461,61 -> 461,66 -> 480,66 -> 480,61 -> 472,61 -> 472,59
|
||||
403,121 -> 403,125 -> 395,125 -> 395,130 -> 412,130 -> 412,125 -> 406,125 -> 406,121
|
||||
470,56 -> 470,54 -> 470,56 -> 472,56 -> 472,46 -> 472,56 -> 474,56 -> 474,49 -> 474,56 -> 476,56 -> 476,49 -> 476,56 -> 478,56 -> 478,54 -> 478,56 -> 480,56 -> 480,46 -> 480,56 -> 482,56 -> 482,52 -> 482,56 -> 484,56 -> 484,53 -> 484,56 -> 486,56 -> 486,47 -> 486,56
|
||||
423,103 -> 427,103
|
||||
480,42 -> 480,43 -> 489,43 -> 489,42
|
||||
470,56 -> 470,54 -> 470,56 -> 472,56 -> 472,46 -> 472,56 -> 474,56 -> 474,49 -> 474,56 -> 476,56 -> 476,49 -> 476,56 -> 478,56 -> 478,54 -> 478,56 -> 480,56 -> 480,46 -> 480,56 -> 482,56 -> 482,52 -> 482,56 -> 484,56 -> 484,53 -> 484,56 -> 486,56 -> 486,47 -> 486,56
|
||||
406,118 -> 406,110 -> 406,118 -> 408,118 -> 408,115 -> 408,118 -> 410,118 -> 410,115 -> 410,118 -> 412,118 -> 412,110 -> 412,118 -> 414,118 -> 414,111 -> 414,118 -> 416,118 -> 416,114 -> 416,118 -> 418,118 -> 418,110 -> 418,118
|
||||
452,76 -> 456,76
|
||||
368,165 -> 368,164 -> 368,165 -> 370,165 -> 370,164 -> 370,165 -> 372,165 -> 372,163 -> 372,165 -> 374,165 -> 374,161 -> 374,165 -> 376,165 -> 376,157 -> 376,165 -> 378,165 -> 378,164 -> 378,165 -> 380,165 -> 380,162 -> 380,165 -> 382,165 -> 382,163 -> 382,165 -> 384,165 -> 384,158 -> 384,165
|
||||
378,152 -> 378,147 -> 378,152 -> 380,152 -> 380,148 -> 380,152 -> 382,152 -> 382,145 -> 382,152 -> 384,152 -> 384,145 -> 384,152 -> 386,152 -> 386,147 -> 386,152 -> 388,152 -> 388,151 -> 388,152 -> 390,152 -> 390,144 -> 390,152
|
||||
368,165 -> 368,164 -> 368,165 -> 370,165 -> 370,164 -> 370,165 -> 372,165 -> 372,163 -> 372,165 -> 374,165 -> 374,161 -> 374,165 -> 376,165 -> 376,157 -> 376,165 -> 378,165 -> 378,164 -> 378,165 -> 380,165 -> 380,162 -> 380,165 -> 382,165 -> 382,163 -> 382,165 -> 384,165 -> 384,158 -> 384,165
|
||||
470,56 -> 470,54 -> 470,56 -> 472,56 -> 472,46 -> 472,56 -> 474,56 -> 474,49 -> 474,56 -> 476,56 -> 476,49 -> 476,56 -> 478,56 -> 478,54 -> 478,56 -> 480,56 -> 480,46 -> 480,56 -> 482,56 -> 482,52 -> 482,56 -> 484,56 -> 484,53 -> 484,56 -> 486,56 -> 486,47 -> 486,56
|
||||
378,152 -> 378,147 -> 378,152 -> 380,152 -> 380,148 -> 380,152 -> 382,152 -> 382,145 -> 382,152 -> 384,152 -> 384,145 -> 384,152 -> 386,152 -> 386,147 -> 386,152 -> 388,152 -> 388,151 -> 388,152 -> 390,152 -> 390,144 -> 390,152
|
||||
368,165 -> 368,164 -> 368,165 -> 370,165 -> 370,164 -> 370,165 -> 372,165 -> 372,163 -> 372,165 -> 374,165 -> 374,161 -> 374,165 -> 376,165 -> 376,157 -> 376,165 -> 378,165 -> 378,164 -> 378,165 -> 380,165 -> 380,162 -> 380,165 -> 382,165 -> 382,163 -> 382,165 -> 384,165 -> 384,158 -> 384,165
|
||||
470,56 -> 470,54 -> 470,56 -> 472,56 -> 472,46 -> 472,56 -> 474,56 -> 474,49 -> 474,56 -> 476,56 -> 476,49 -> 476,56 -> 478,56 -> 478,54 -> 478,56 -> 480,56 -> 480,46 -> 480,56 -> 482,56 -> 482,52 -> 482,56 -> 484,56 -> 484,53 -> 484,56 -> 486,56 -> 486,47 -> 486,56
|
||||
430,84 -> 430,85 -> 436,85
|
||||
452,70 -> 452,71 -> 465,71 -> 465,70
|
||||
378,152 -> 378,147 -> 378,152 -> 380,152 -> 380,148 -> 380,152 -> 382,152 -> 382,145 -> 382,152 -> 384,152 -> 384,145 -> 384,152 -> 386,152 -> 386,147 -> 386,152 -> 388,152 -> 388,151 -> 388,152 -> 390,152 -> 390,144 -> 390,152
|
||||
470,56 -> 470,54 -> 470,56 -> 472,56 -> 472,46 -> 472,56 -> 474,56 -> 474,49 -> 474,56 -> 476,56 -> 476,49 -> 476,56 -> 478,56 -> 478,54 -> 478,56 -> 480,56 -> 480,46 -> 480,56 -> 482,56 -> 482,52 -> 482,56 -> 484,56 -> 484,53 -> 484,56 -> 486,56 -> 486,47 -> 486,56
|
||||
395,136 -> 399,136
|
||||
420,101 -> 424,101
|
||||
470,56 -> 470,54 -> 470,56 -> 472,56 -> 472,46 -> 472,56 -> 474,56 -> 474,49 -> 474,56 -> 476,56 -> 476,49 -> 476,56 -> 478,56 -> 478,54 -> 478,56 -> 480,56 -> 480,46 -> 480,56 -> 482,56 -> 482,52 -> 482,56 -> 484,56 -> 484,53 -> 484,56 -> 486,56 -> 486,47 -> 486,56
|
||||
389,136 -> 393,136
|
||||
427,88 -> 427,92 -> 423,92 -> 423,98 -> 440,98 -> 440,92 -> 432,92 -> 432,88
|
||||
470,56 -> 470,54 -> 470,56 -> 472,56 -> 472,46 -> 472,56 -> 474,56 -> 474,49 -> 474,56 -> 476,56 -> 476,49 -> 476,56 -> 478,56 -> 478,54 -> 478,56 -> 480,56 -> 480,46 -> 480,56 -> 482,56 -> 482,52 -> 482,56 -> 484,56 -> 484,53 -> 484,56 -> 486,56 -> 486,47 -> 486,56
|
||||
427,88 -> 427,92 -> 423,92 -> 423,98 -> 440,98 -> 440,92 -> 432,92 -> 432,88
|
||||
398,139 -> 402,139
|
||||
489,28 -> 489,31 -> 484,31 -> 484,37 -> 500,37 -> 500,31 -> 492,31 -> 492,28
|
||||
466,59 -> 466,61 -> 461,61 -> 461,66 -> 480,66 -> 480,61 -> 472,61 -> 472,59
|
||||
368,165 -> 368,164 -> 368,165 -> 370,165 -> 370,164 -> 370,165 -> 372,165 -> 372,163 -> 372,165 -> 374,165 -> 374,161 -> 374,165 -> 376,165 -> 376,157 -> 376,165 -> 378,165 -> 378,164 -> 378,165 -> 380,165 -> 380,162 -> 380,165 -> 382,165 -> 382,163 -> 382,165 -> 384,165 -> 384,158 -> 384,165
|
||||
452,70 -> 452,71 -> 465,71 -> 465,70
|
||||
420,105 -> 424,105
|
||||
378,152 -> 378,147 -> 378,152 -> 380,152 -> 380,148 -> 380,152 -> 382,152 -> 382,145 -> 382,152 -> 384,152 -> 384,145 -> 384,152 -> 386,152 -> 386,147 -> 386,152 -> 388,152 -> 388,151 -> 388,152 -> 390,152 -> 390,144 -> 390,152
|
||||
378,152 -> 378,147 -> 378,152 -> 380,152 -> 380,148 -> 380,152 -> 382,152 -> 382,145 -> 382,152 -> 384,152 -> 384,145 -> 384,152 -> 386,152 -> 386,147 -> 386,152 -> 388,152 -> 388,151 -> 388,152 -> 390,152 -> 390,144 -> 390,152
|
||||
470,56 -> 470,54 -> 470,56 -> 472,56 -> 472,46 -> 472,56 -> 474,56 -> 474,49 -> 474,56 -> 476,56 -> 476,49 -> 476,56 -> 478,56 -> 478,54 -> 478,56 -> 480,56 -> 480,46 -> 480,56 -> 482,56 -> 482,52 -> 482,56 -> 484,56 -> 484,53 -> 484,56 -> 486,56 -> 486,47 -> 486,56
|
||||
449,78 -> 453,78
|
||||
470,56 -> 470,54 -> 470,56 -> 472,56 -> 472,46 -> 472,56 -> 474,56 -> 474,49 -> 474,56 -> 476,56 -> 476,49 -> 476,56 -> 478,56 -> 478,54 -> 478,56 -> 480,56 -> 480,46 -> 480,56 -> 482,56 -> 482,52 -> 482,56 -> 484,56 -> 484,53 -> 484,56 -> 486,56 -> 486,47 -> 486,56
|
||||
489,28 -> 489,31 -> 484,31 -> 484,37 -> 500,37 -> 500,31 -> 492,31 -> 492,28
|
||||
406,118 -> 406,110 -> 406,118 -> 408,118 -> 408,115 -> 408,118 -> 410,118 -> 410,115 -> 410,118 -> 412,118 -> 412,110 -> 412,118 -> 414,118 -> 414,111 -> 414,118 -> 416,118 -> 416,114 -> 416,118 -> 418,118 -> 418,110 -> 418,118
|
||||
492,25 -> 497,25
|
||||
406,118 -> 406,110 -> 406,118 -> 408,118 -> 408,115 -> 408,118 -> 410,118 -> 410,115 -> 410,118 -> 412,118 -> 412,110 -> 412,118 -> 414,118 -> 414,111 -> 414,118 -> 416,118 -> 416,114 -> 416,118 -> 418,118 -> 418,110 -> 418,118
|
||||
368,165 -> 368,164 -> 368,165 -> 370,165 -> 370,164 -> 370,165 -> 372,165 -> 372,163 -> 372,165 -> 374,165 -> 374,161 -> 374,165 -> 376,165 -> 376,157 -> 376,165 -> 378,165 -> 378,164 -> 378,165 -> 380,165 -> 380,162 -> 380,165 -> 382,165 -> 382,163 -> 382,165 -> 384,165 -> 384,158 -> 384,165
|
||||
406,118 -> 406,110 -> 406,118 -> 408,118 -> 408,115 -> 408,118 -> 410,118 -> 410,115 -> 410,118 -> 412,118 -> 412,110 -> 412,118 -> 414,118 -> 414,111 -> 414,118 -> 416,118 -> 416,114 -> 416,118 -> 418,118 -> 418,110 -> 418,118
|
||||
470,56 -> 470,54 -> 470,56 -> 472,56 -> 472,46 -> 472,56 -> 474,56 -> 474,49 -> 474,56 -> 476,56 -> 476,49 -> 476,56 -> 478,56 -> 478,54 -> 478,56 -> 480,56 -> 480,46 -> 480,56 -> 482,56 -> 482,52 -> 482,56 -> 484,56 -> 484,53 -> 484,56 -> 486,56 -> 486,47 -> 486,56
|
||||
378,152 -> 378,147 -> 378,152 -> 380,152 -> 380,148 -> 380,152 -> 382,152 -> 382,145 -> 382,152 -> 384,152 -> 384,145 -> 384,152 -> 386,152 -> 386,147 -> 386,152 -> 388,152 -> 388,151 -> 388,152 -> 390,152 -> 390,144 -> 390,152
|
||||
368,165 -> 368,164 -> 368,165 -> 370,165 -> 370,164 -> 370,165 -> 372,165 -> 372,163 -> 372,165 -> 374,165 -> 374,161 -> 374,165 -> 376,165 -> 376,157 -> 376,165 -> 378,165 -> 378,164 -> 378,165 -> 380,165 -> 380,162 -> 380,165 -> 382,165 -> 382,163 -> 382,165 -> 384,165 -> 384,158 -> 384,165
|
||||
406,118 -> 406,110 -> 406,118 -> 408,118 -> 408,115 -> 408,118 -> 410,118 -> 410,115 -> 410,118 -> 412,118 -> 412,110 -> 412,118 -> 414,118 -> 414,111 -> 414,118 -> 416,118 -> 416,114 -> 416,118 -> 418,118 -> 418,110 -> 418,118
|
||||
368,165 -> 368,164 -> 368,165 -> 370,165 -> 370,164 -> 370,165 -> 372,165 -> 372,163 -> 372,165 -> 374,165 -> 374,161 -> 374,165 -> 376,165 -> 376,157 -> 376,165 -> 378,165 -> 378,164 -> 378,165 -> 380,165 -> 380,162 -> 380,165 -> 382,165 -> 382,163 -> 382,165 -> 384,165 -> 384,158 -> 384,165
|
||||
368,165 -> 368,164 -> 368,165 -> 370,165 -> 370,164 -> 370,165 -> 372,165 -> 372,163 -> 372,165 -> 374,165 -> 374,161 -> 374,165 -> 376,165 -> 376,157 -> 376,165 -> 378,165 -> 378,164 -> 378,165 -> 380,165 -> 380,162 -> 380,165 -> 382,165 -> 382,163 -> 382,165 -> 384,165 -> 384,158 -> 384,165
|
||||
392,133 -> 396,133
|
||||
497,13 -> 502,13
|
||||
378,152 -> 378,147 -> 378,152 -> 380,152 -> 380,148 -> 380,152 -> 382,152 -> 382,145 -> 382,152 -> 384,152 -> 384,145 -> 384,152 -> 386,152 -> 386,147 -> 386,152 -> 388,152 -> 388,151 -> 388,152 -> 390,152 -> 390,144 -> 390,152
|
||||
368,165 -> 368,164 -> 368,165 -> 370,165 -> 370,164 -> 370,165 -> 372,165 -> 372,163 -> 372,165 -> 374,165 -> 374,161 -> 374,165 -> 376,165 -> 376,157 -> 376,165 -> 378,165 -> 378,164 -> 378,165 -> 380,165 -> 380,162 -> 380,165 -> 382,165 -> 382,163 -> 382,165 -> 384,165 -> 384,158 -> 384,165
|
||||
432,82 -> 450,82 -> 450,81
|
||||
368,165 -> 368,164 -> 368,165 -> 370,165 -> 370,164 -> 370,165 -> 372,165 -> 372,163 -> 372,165 -> 374,165 -> 374,161 -> 374,165 -> 376,165 -> 376,157 -> 376,165 -> 378,165 -> 378,164 -> 378,165 -> 380,165 -> 380,162 -> 380,165 -> 382,165 -> 382,163 -> 382,165 -> 384,165 -> 384,158 -> 384,165
|
||||
386,139 -> 390,139
|
||||
368,165 -> 368,164 -> 368,165 -> 370,165 -> 370,164 -> 370,165 -> 372,165 -> 372,163 -> 372,165 -> 374,165 -> 374,161 -> 374,165 -> 376,165 -> 376,157 -> 376,165 -> 378,165 -> 378,164 -> 378,165 -> 380,165 -> 380,162 -> 380,165 -> 382,165 -> 382,163 -> 382,165 -> 384,165 -> 384,158 -> 384,165
|
||||
368,165 -> 368,164 -> 368,165 -> 370,165 -> 370,164 -> 370,165 -> 372,165 -> 372,163 -> 372,165 -> 374,165 -> 374,161 -> 374,165 -> 376,165 -> 376,157 -> 376,165 -> 378,165 -> 378,164 -> 378,165 -> 380,165 -> 380,162 -> 380,165 -> 382,165 -> 382,163 -> 382,165 -> 384,165 -> 384,158 -> 384,165
|
||||
470,56 -> 470,54 -> 470,56 -> 472,56 -> 472,46 -> 472,56 -> 474,56 -> 474,49 -> 474,56 -> 476,56 -> 476,49 -> 476,56 -> 478,56 -> 478,54 -> 478,56 -> 480,56 -> 480,46 -> 480,56 -> 482,56 -> 482,52 -> 482,56 -> 484,56 -> 484,53 -> 484,56 -> 486,56 -> 486,47 -> 486,56
|
||||
378,152 -> 378,147 -> 378,152 -> 380,152 -> 380,148 -> 380,152 -> 382,152 -> 382,145 -> 382,152 -> 384,152 -> 384,145 -> 384,152 -> 386,152 -> 386,147 -> 386,152 -> 388,152 -> 388,151 -> 388,152 -> 390,152 -> 390,144 -> 390,152
|
||||
470,56 -> 470,54 -> 470,56 -> 472,56 -> 472,46 -> 472,56 -> 474,56 -> 474,49 -> 474,56 -> 476,56 -> 476,49 -> 476,56 -> 478,56 -> 478,54 -> 478,56 -> 480,56 -> 480,46 -> 480,56 -> 482,56 -> 482,52 -> 482,56 -> 484,56 -> 484,53 -> 484,56 -> 486,56 -> 486,47 -> 486,56
|
||||
392,139 -> 396,139
|
||||
406,118 -> 406,110 -> 406,118 -> 408,118 -> 408,115 -> 408,118 -> 410,118 -> 410,115 -> 410,118 -> 412,118 -> 412,110 -> 412,118 -> 414,118 -> 414,111 -> 414,118 -> 416,118 -> 416,114 -> 416,118 -> 418,118 -> 418,110 -> 418,118
|
||||
403,121 -> 403,125 -> 395,125 -> 395,130 -> 412,130 -> 412,125 -> 406,125 -> 406,121
|
||||
470,56 -> 470,54 -> 470,56 -> 472,56 -> 472,46 -> 472,56 -> 474,56 -> 474,49 -> 474,56 -> 476,56 -> 476,49 -> 476,56 -> 478,56 -> 478,54 -> 478,56 -> 480,56 -> 480,46 -> 480,56 -> 482,56 -> 482,52 -> 482,56 -> 484,56 -> 484,53 -> 484,56 -> 486,56 -> 486,47 -> 486,56
|
||||
470,56 -> 470,54 -> 470,56 -> 472,56 -> 472,46 -> 472,56 -> 474,56 -> 474,49 -> 474,56 -> 476,56 -> 476,49 -> 476,56 -> 478,56 -> 478,54 -> 478,56 -> 480,56 -> 480,46 -> 480,56 -> 482,56 -> 482,52 -> 482,56 -> 484,56 -> 484,53 -> 484,56 -> 486,56 -> 486,47 -> 486,56
|
||||
489,28 -> 489,31 -> 484,31 -> 484,37 -> 500,37 -> 500,31 -> 492,31 -> 492,28
|
||||
406,118 -> 406,110 -> 406,118 -> 408,118 -> 408,115 -> 408,118 -> 410,118 -> 410,115 -> 410,118 -> 412,118 -> 412,110 -> 412,118 -> 414,118 -> 414,111 -> 414,118 -> 416,118 -> 416,114 -> 416,118 -> 418,118 -> 418,110 -> 418,118
|
||||
378,152 -> 378,147 -> 378,152 -> 380,152 -> 380,148 -> 380,152 -> 382,152 -> 382,145 -> 382,152 -> 384,152 -> 384,145 -> 384,152 -> 386,152 -> 386,147 -> 386,152 -> 388,152 -> 388,151 -> 388,152 -> 390,152 -> 390,144 -> 390,152
|
||||
378,152 -> 378,147 -> 378,152 -> 380,152 -> 380,148 -> 380,152 -> 382,152 -> 382,145 -> 382,152 -> 384,152 -> 384,145 -> 384,152 -> 386,152 -> 386,147 -> 386,152 -> 388,152 -> 388,151 -> 388,152 -> 390,152 -> 390,144 -> 390,152
|
||||
|
|
@ -0,0 +1,2 @@
|
|||
498,4 -> 498,6 -> 496,6
|
||||
503,4 -> 502,4 -> 502,9 -> 494,9
|
||||
|
|
@ -0,0 +1,214 @@
|
|||
import { readFileSync } from 'fs'
|
||||
|
||||
const CaveSpaces = {
|
||||
rock: '#',
|
||||
empty: '.',
|
||||
sand: 'o',
|
||||
source: '+',
|
||||
infinity: '∞',
|
||||
} as const
|
||||
|
||||
type CaveSpace = typeof CaveSpaces[keyof typeof CaveSpaces]
|
||||
type CavePoint = [number, number]
|
||||
type Cave = {
|
||||
spaces: CaveSpace[][]
|
||||
source: CavePoint
|
||||
dimensions: {
|
||||
top: number
|
||||
bottom: number
|
||||
left: number
|
||||
right: number
|
||||
}
|
||||
floor: CaveSpace
|
||||
sands: CavePoint[]
|
||||
}
|
||||
|
||||
function printCave(cave: Cave) {
|
||||
console.log(cave.spaces.map((row) => row.join('')).join('\n'))
|
||||
}
|
||||
|
||||
function getCavePoint(cave: Cave, [x, y]: CavePoint): CaveSpace {
|
||||
if (x - cave.dimensions.left < 0) {
|
||||
expandCaveLeft(cave)
|
||||
} else if (x - cave.dimensions.left > cave.dimensions.right - cave.dimensions.left) {
|
||||
expandCaveRight(cave)
|
||||
}
|
||||
|
||||
const space = cave.spaces?.[y - cave.dimensions.top]?.[x - cave.dimensions.left]
|
||||
return space ?? CaveSpaces.infinity
|
||||
}
|
||||
|
||||
function setCavePoint(cave: Cave, [x, y]: CavePoint, space: CaveSpace): CavePoint {
|
||||
cave.spaces[y - cave.dimensions.top][x - cave.dimensions.left] = space
|
||||
return [x, y]
|
||||
}
|
||||
|
||||
function makeCave(paths: number[][][], source: [number, number], floor: CaveSpace): Cave {
|
||||
const cave: Cave = {
|
||||
spaces: [],
|
||||
dimensions: {
|
||||
left: source[0],
|
||||
right: source[0],
|
||||
top: source[1],
|
||||
bottom: source[1] + 2,
|
||||
},
|
||||
source,
|
||||
floor,
|
||||
sands: [],
|
||||
}
|
||||
|
||||
cave.dimensions = paths.reduce((dimensions, path) => {
|
||||
const xs = path.map(([x]) => x)
|
||||
const ys = path.map(([, y]) => y)
|
||||
const minX = Math.min(...xs)
|
||||
const maxX = Math.max(...xs)
|
||||
const maxY = Math.max(...ys)
|
||||
|
||||
return {
|
||||
...dimensions,
|
||||
left: Math.min(dimensions.left, minX - 1),
|
||||
right: Math.max(dimensions.right, maxX + 1),
|
||||
bottom: Math.max(dimensions.bottom, maxY + 2),
|
||||
}
|
||||
}, cave.dimensions)
|
||||
|
||||
cave.spaces = Array(cave.dimensions.bottom - cave.dimensions.top + 1)
|
||||
.fill('')
|
||||
.map(() => Array(cave.dimensions.right - cave.dimensions.left + 1).fill(CaveSpaces.empty))
|
||||
|
||||
paths.forEach((path) => plotRockPaths(cave, path))
|
||||
|
||||
setCavePoint(cave, cave.source, CaveSpaces.source)
|
||||
makeCaveFloor(cave)
|
||||
|
||||
return cave
|
||||
}
|
||||
|
||||
function expandCaveLeft(cave: Cave) {
|
||||
if (cave.dimensions.left > 0) {
|
||||
cave.spaces.forEach((row) => {
|
||||
row.unshift(CaveSpaces.empty)
|
||||
})
|
||||
cave.dimensions.left += -1
|
||||
|
||||
makeCaveFloor(cave)
|
||||
}
|
||||
}
|
||||
|
||||
function expandCaveRight(cave: Cave) {
|
||||
cave.spaces.forEach((row) => {
|
||||
row.push(CaveSpaces.empty)
|
||||
})
|
||||
|
||||
cave.dimensions.right += 1
|
||||
|
||||
makeCaveFloor(cave)
|
||||
}
|
||||
|
||||
function makeCaveFloor(cave: Cave) {
|
||||
const bottom = cave.dimensions.bottom
|
||||
const floor = cave.spaces[bottom]
|
||||
floor.forEach((s, x) => {
|
||||
floor[x] = s === CaveSpaces.empty ? cave.floor : s
|
||||
})
|
||||
}
|
||||
|
||||
function isSource(cave: Cave, [x, y]: CavePoint): boolean {
|
||||
return x === cave.source[0] && y === cave.source[1]
|
||||
}
|
||||
|
||||
function isSandInRow(cave: Cave, row: number): boolean {
|
||||
return cave.spaces.slice(row)[0].some((space) => space === CaveSpaces.sand)
|
||||
}
|
||||
|
||||
function plotRockPaths(cave: Cave, path: number[][]) {
|
||||
path.reduce((from, to) => {
|
||||
const [toX, toY] = to
|
||||
|
||||
if (from.length == 2 && to.length == 2) {
|
||||
const [fromX, fromY] = from
|
||||
|
||||
if (fromY === toY) {
|
||||
for (let x = Math.min(fromX, toX); x <= Math.max(fromX, toX); x++) {
|
||||
setCavePoint(cave, [x, toY], CaveSpaces.rock)
|
||||
}
|
||||
} else {
|
||||
for (let y = Math.min(fromY, toY); y <= Math.max(fromY, toY); y++) {
|
||||
setCavePoint(cave, [fromX, y], CaveSpaces.rock)
|
||||
}
|
||||
}
|
||||
}
|
||||
return to
|
||||
}, [])
|
||||
}
|
||||
|
||||
function dropSandOneStep(sand: CavePoint, cave: Cave): boolean {
|
||||
const [x, y] = sand
|
||||
const tryMoves: CavePoint[] = [
|
||||
[x, y + 1],
|
||||
[x - 1, y + 1],
|
||||
[x + 1, y + 1],
|
||||
]
|
||||
|
||||
const moved = tryMoves.find((move) => {
|
||||
if (getCavePoint(cave, move) === CaveSpaces.empty) {
|
||||
setCavePoint(cave, sand, isSource(cave, sand) ? CaveSpaces.source : CaveSpaces.empty)
|
||||
setCavePoint(cave, move, CaveSpaces.sand)
|
||||
sand.splice(0, 2, ...move)
|
||||
return true
|
||||
}
|
||||
return false
|
||||
})
|
||||
|
||||
return moved !== undefined
|
||||
}
|
||||
|
||||
function dropSand(cave: Cave) {
|
||||
const sand = [...cave.source] as CavePoint
|
||||
cave.sands.push(sand)
|
||||
setCavePoint(cave, sand, CaveSpaces.sand)
|
||||
|
||||
while (dropSandOneStep(sand, cave)) {
|
||||
// keep dropping
|
||||
}
|
||||
}
|
||||
|
||||
function solvePart1(lines: string[]): number {
|
||||
const paths = lines.map((line) => line.split(' -> ').map((point) => point.split(',').map(Number)))
|
||||
const cave = makeCave(paths, [500, 0], CaveSpaces.empty)
|
||||
|
||||
while (!isSandInRow(cave, -1)) {
|
||||
dropSand(cave)
|
||||
}
|
||||
|
||||
printCave(cave)
|
||||
|
||||
return cave.sands.length - 1
|
||||
}
|
||||
|
||||
function solvePart2(lines: string[]): number {
|
||||
const paths = lines.map((line) => line.split(' -> ').map((point) => point.split(',').map(Number)))
|
||||
|
||||
const cave = makeCave(paths, [500, 0], CaveSpaces.rock)
|
||||
|
||||
while (!isSandInRow(cave, 0)) {
|
||||
dropSand(cave)
|
||||
}
|
||||
|
||||
printCave(cave)
|
||||
|
||||
return cave.sands.length
|
||||
}
|
||||
|
||||
function run() {
|
||||
const input = process.argv.slice(2)[0]
|
||||
const file = readFileSync(input, 'utf8')
|
||||
const lines = file.split('\n').slice(0, -1)
|
||||
const solution1 = solvePart1(lines)
|
||||
console.log(`part1: ${solution1}`)
|
||||
|
||||
const solution2 = solvePart2(lines)
|
||||
console.log(`part2: ${solution2}`)
|
||||
}
|
||||
|
||||
run()
|
||||
Reference in New Issue