51 lines
1.2 KiB
Python
51 lines
1.2 KiB
Python
from tools.aoc import AOCDay
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from tools.coordinate import Coordinate
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from tools.grid import Grid
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from typing import Any, List
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def getOctopusGrid(lines: List[str]) -> Grid:
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grid = Grid(-1)
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for y, l in enumerate(lines):
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for x, c in enumerate(l):
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grid.set(Coordinate(x, y), int(c))
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return grid
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def flashGrid(grid: Grid) -> int:
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flashers = set()
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for c in grid.getActiveCells():
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if grid.add(c) > 9:
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flashers.add(c)
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did_flash = set()
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while flashers:
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thisFlash = flashers.pop()
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did_flash.add(thisFlash)
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grid.set(thisFlash, 0)
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for n in grid.getNeighboursOf(thisFlash):
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if n not in did_flash and grid.add(n) > 9:
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flashers.add(n)
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return len(did_flash)
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class Day(AOCDay):
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test_solutions_p1 = [1656, 1601]
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test_solutions_p2 = [195, 368]
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def part1(self) -> Any:
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grid = getOctopusGrid(self.getInput())
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return sum([flashGrid(grid) for _ in range(100)])
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def part2(self) -> Any:
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grid = getOctopusGrid(self.getInput())
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step_count = 0
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while grid.getSum() != 0:
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step_count += 1
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flashGrid(grid)
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return step_count
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