My Advent of Code solutions in Python.
kevinyap.ca/2019/12/going-fast-in-advent-of-code/
advent-of-code
python
Add solution for 2024/03
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2024/day03.py
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2024/day03.py
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import re
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import fileinput
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MUL_RE = r"mul\((\d+),(\d+)\)"
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DONT_DO_RE = r"don\'t\(\).*?(do\(\)|$)" # match a `do()` or end of string
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def count_muls(program):
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return sum(int(x) * int(y) for x, y in re.findall(MUL_RE, program))
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program = ''.join(line.strip() for line in fileinput.input())
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print("Part 1:", count_muls(program))
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print("Part 2:", count_muls(re.sub(DONT_DO_RE, '', program)))
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