Pascal Lais
a81d7b914c
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64 lines
1.7 KiB
Python
64 lines
1.7 KiB
Python
#!/usr/bin/env python3
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from pathlib import Path
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def enhance(algorithm, in_image, boundary):
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out_image = []
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height = len(in_image)
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width = len(in_image[0])
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for i in range(-boundary, height + boundary):
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line = ''
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valid = False
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for j in range(-boundary, width + boundary):
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idx = ''
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for k in range(i - 1, i + 2):
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for l in range(j - 1, j + 2):
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if 0 <= k < height and \
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0 <= l < width and \
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'#' == in_image[k][l]:
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idx += '1'
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else:
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idx += '0'
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idx = int(idx, 2)
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if not valid and '#' == algorithm[idx]:
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valid = True
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line += algorithm[idx]
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if valid:
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out_image.append(line)
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return out_image
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def part_1(input):
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result = 0
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algorithm = input[0].rstrip()
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image = []
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for line in input[2:]:
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image.append(line.rstrip())
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image = enhance(algorithm, image, 3)
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image = enhance(algorithm, image, -1)
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for line in image:
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result += line.count('#')
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print("Part 1 result:", result)
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def part_2(input):
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result = 0
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algorithm = input[0].rstrip()
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image = []
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for line in input[2:]:
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image.append(line.rstrip())
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for _ in range(25):
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image = enhance(algorithm, image, 3)
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image = enhance(algorithm, image, -1)
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for line in image:
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result += line.count('#')
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print("Part 2 result:", result)
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input = list()
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p = Path(__file__).with_name('input.txt')
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with open(p) as f:
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input = f.readlines()
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part_1(input)
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part_2(input)
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