90 lines
2 KiB
Python
90 lines
2 KiB
Python
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#!/bin/python3
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from collections import defaultdict
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from enum import Enum
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from itertools import pairwise
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class Tile(Enum):
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AIR = 1
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ROCK = 2
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SOURCE = 3
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SAND = 4
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grid = defaultdict(lambda: Tile.AIR)
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with open('inputs/day14.txt', 'r') as f:
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for line in f:
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for (start, end) in pairwise(line.strip().split(' -> ')):
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[sx, sy] = map(int, start.split(','))
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[ex, ey] = map(int, end.split(','))
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dx = 0
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dy = 0
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if ex > sx:
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dx = 1
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elif ex < sx:
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dx = -1
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if ey > sy:
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dy = 1
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elif ey < sy:
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dy = -1
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curx = sx
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cury = sy
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grid[(curx, cury)] = Tile.ROCK
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while curx != ex or cury != ey:
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curx += dx
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cury += dy
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grid[(curx, cury)] = Tile.ROCK
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highest_y = -1
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for (x, y), tile in grid.items():
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if y > highest_y:
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highest_y = y
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def query_grid(x, y):
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if y == highest_y + 2:
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return Tile.ROCK
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return grid[(x, y)]
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(sourcex, sourcey) = (500, 0)
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def abyss_underneath(x, y):
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for (gridx, gridy), tile in grid.items():
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if gridy > y and gridx == x and tile != Tile.AIR:
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return False
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return True
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# voided = False
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blocked = False
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while True:
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(x, y) = (sourcex, sourcey)
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while True:
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# if abyss_underneath(x, y):
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# voided = True
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# break
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if query_grid(x, y+1) == Tile.AIR:
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y += 1
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elif query_grid(x-1, y+1) == Tile.AIR:
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y += 1
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x -= 1
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elif query_grid(x+1, y+1) == Tile.AIR:
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y += 1
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x += 1
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else:
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if (x, y) == (sourcex, sourcey):
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blocked = True
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break
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# if voided:
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# break
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if blocked:
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break
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grid[(x, y)] = Tile.SAND
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rest_count = 0
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for (x, y), tile in grid.items():
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if tile == Tile.SAND:
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rest_count += 1
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print(rest_count + 1)
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