46 lines
1.2 KiB
Python
46 lines
1.2 KiB
Python
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#!/usr/bin/env python
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from collections import defaultdict
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def read_input(filename):
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with open(filename) as f:
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for line in f:
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line = line.strip()
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yield line
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def find_xmas(data, posX, posY):
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if data[posX][posY] != 'A':
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return 0
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tmp1 = data[posX-1][posY-1] + data[posX][posY] + data[posX+1][posY+1]
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tmp2 = data[posX+1][posY-1] + data[posX][posY] + data[posX-1][posY+1]
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if not tmp1 in ['MAS', 'SAM']:
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return 0
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if not tmp2 in ['MAS', 'SAM']:
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return 0
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return 1
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def main(args):
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puzzle = defaultdict(lambda: defaultdict(lambda: "."))
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for id1, line in enumerate(read_input(args.file)):
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for id2, char in enumerate(list(line)):
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puzzle[id1][id2] = char
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count = 0
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for posX in range(len(puzzle)):
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for posY in range(len(puzzle[posX])):
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if puzzle[posX][posY] != 'A':
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continue
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count += find_xmas(puzzle, posX, posY)
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print(count)
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if __name__ == "__main__":
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import argparse
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parser = argparse.ArgumentParser(
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prog='AdventOfCode 2024, Day 04, part 1',
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)
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parser.add_argument('-f', '--file', required=True)
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args = parser.parse_args()
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main(args)
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