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37 lines
945 B
Python
37 lines
945 B
Python
12 months ago
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import re
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def do_task(lines):
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lines = (
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["." * (len(lines[0]) + 2)]
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+ ["." + line.strip() + "." for line in lines]
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+ ["." * (len(lines[0]) + 2)]
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)
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symbol_sum = 0
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for y in range(1, len(lines) - 1):
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for m in re.finditer(r"\d+", lines[y]):
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if re.search(
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r"[^.0-9]",
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lines[y - 1][m.start() - 1 : m.end() + 1]
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+ lines[y][m.start() - 1] + lines[y][m.end()]
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+ lines[y + 1][m.start() - 1 : m.end() + 1],
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):
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symbol_sum += int(m[0])
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return symbol_sum
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with open("day03/data/input100.txt") as infile:
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lines = infile.readlines()
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result = do_task(lines)
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print(result)
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print(result == 4361)
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with open("day03/data/input101.txt") as infile:
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lines = infile.readlines()
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result = do_task(lines)
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print(result)
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print(result == 525181)
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