119 lines
3.1 KiB
Python
119 lines
3.1 KiB
Python
import fileinput
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from pprint import pprint
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from copy import deepcopy
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layout = []
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for line in fileinput.input():
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if line.strip():
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layout.append(list(line.strip()))
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part1 = -1
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old_layout = deepcopy(layout)
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row_length = len(old_layout[0])
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while True:
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new_layout = [[None] * len(row) for row in old_layout]
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for y in range(len(old_layout)):
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for x in range(len(old_layout[0])):
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if old_layout[y][x] == ".":
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new_layout[y][x] = old_layout[y][x]
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continue
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count = sum(
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(
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x >= 1 and old_layout[y][x - 1] == "#",
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x < row_length - 1 and old_layout[y][x + 1] == "#",
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)
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)
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if y >= 1:
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count += sum(
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(
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x >= 1 and old_layout[y - 1][x - 1] == "#",
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old_layout[y - 1][x] == "#",
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x < row_length - 1 and old_layout[y - 1][x + 1] == "#",
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)
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)
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if y < len(layout) - 1:
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count += sum(
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(
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x >= 1 and old_layout[y + 1][x - 1] == "#",
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old_layout[y + 1][x] == "#",
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x < row_length - 1 and old_layout[y + 1][x + 1] == "#",
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)
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)
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if count == 0:
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new_layout[y][x] = "#"
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elif count >= 4:
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new_layout[y][x] = "L"
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else:
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new_layout[y][x] = old_layout[y][x]
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new_part1 = sum(sum(s == "#" for s in row) for row in new_layout)
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if part1 == new_part1:
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break
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part1 = new_part1
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old_layout = new_layout
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print(part1)
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part2 = -1
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old_layout = deepcopy(layout)
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def get(x, y, dx, dy):
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try:
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x += dx
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y += dy
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while old_layout[y][x] == ".":
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if x < 0 or y < 0:
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raise IndexError
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x += dx
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y += dy
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except:
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return "."
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return old_layout[y][x]
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while True:
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new_layout = [[None] * len(row) for row in old_layout]
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for y in range(1, len(old_layout) - 1):
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for x in range(1, len(old_layout[0]) - 1):
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if old_layout[y][x] == ".":
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new_layout[y][x] = old_layout[y][x]
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continue
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count = sum(
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(
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get(x, y, -1, -1) == "#",
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get(x, y, -1, 0) == "#",
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get(x, y, -1, 1) == "#",
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get(x, y, 0, -1) == "#",
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get(x, y, 0, 1) == "#",
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get(x, y, 1, -1) == "#",
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get(x, y, 1, 0) == "#",
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get(x, y, 1, 1) == "#",
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)
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)
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if count == 0:
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new_layout[y][x] = "#"
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elif count >= 5:
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new_layout[y][x] = "L"
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else:
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new_layout[y][x] = old_layout[y][x]
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new_part2 = sum(sum(s == "#" for s in row) for row in new_layout)
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if part2 == new_part2:
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break
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part2 = new_part2
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old_layout = new_layout
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print(part2)
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