43 lines
1.4 KiB
Python
43 lines
1.4 KiB
Python
from common import *
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from typing import Dict, Tuple
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def count_neighbours(matrix:Dict[Tuple[int, int, int], str], position:Tuple[int, int, int]) -> int:
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num_neighbours = 0
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x, y, z = position
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for (x_delta, y_delta, z_delta) in translation_vectors_3d:
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if matrix.get((x + x_delta, y+y_delta, z+z_delta), inactive_marker) == active_marker:
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num_neighbours += 1
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return num_neighbours
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def iterate(matrix:Dict[Tuple[int, int, int], str]) -> Dict[Tuple[int, int, int], str]:
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new = {}
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# get min/max for x, y and z values
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keys = list(matrix)
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_, _, min_z = min(keys, key=lambda x: x[2])
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_, _, max_z = max(keys, key=lambda x: x[2])
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_, min_y, _ = min(keys, key=lambda x: x[1])
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_, max_y, _ = max(keys, key=lambda x: x[1])
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min_x, _, _ = min(keys, key=lambda x: x[0])
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max_x, _, _ = max(keys, key=lambda x: x[0])
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for z in range(min_z - 2, max_z + 2):
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for y in range(min_y - 2, max_y + 2):
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for x in range(min_x - 2, max_x + 2):
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num_neighbours = count_neighbours(matrix, (x, y, z))
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current_state = matrix.get((x, y, z), inactive_marker)
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if (num_neighbours == 2 and current_state == active_marker) or num_neighbours == 3:
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new[(x, y, z)] = active_marker
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return new
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def partOne(instr: str) -> int:
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matrix = parse(instr, lambda x, y: (x, y, 0))
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for _ in range(6):
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matrix = iterate(matrix)
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return len(matrix)
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