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28 lines
924 B
Python
28 lines
924 B
Python
import os
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import re
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from collections import defaultdict
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file_path = os.path.join(os.path.dirname(__file__), "./input.txt")
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# file_path = os.path.join(os.path.dirname(__file__), "./test-input.txt")
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input = open(file_path).read().strip()
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lines = input.split("\n")
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lights = defaultdict(bool)
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for line in lines:
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match = re.findall(r"(.*?)(\d*,\d*) through (\d*,\d*)", line)
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if not match:
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continue
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instruction, start, end = match[0]
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instruction = instruction.strip()
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start = tuple(map(int, start.split(",")))
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end = tuple(map(int, end.split(",")))
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for i in range(start[0], end[0] + 1):
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for j in range(start[1], end[1] + 1):
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if instruction == "turn on":
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lights[(i, j)] = True
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elif instruction == "turn off":
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lights[(i, j)] = False
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else:
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lights[(i, j)] = not lights[(i, j)]
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print(sum(lights.values()))
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