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59 lines
1.5 KiB
Python
59 lines
1.5 KiB
Python
from collections.abc import Generator
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from typing import TypeVar
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def main(filename: str, expected_part_1: int = None, expected_part_2: int = None):
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print(f"\n+ Running on {filename}")
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with open(filename) as f:
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data = f.read().strip().split("\n")
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data = parse_data(data)
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solution_part_1 = solve_part_1(data)
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print(f"1. Found {solution_part_1}")
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if expected_part_1:
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assert expected_part_1 == solution_part_1
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solution_part_2 = solve_part_2(data)
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print(f"2. Found {solution_part_2}")
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if expected_part_2:
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assert expected_part_2 == solution_part_2
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DataType = str
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T = TypeVar("T")
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def parse_data(data: list[str]) -> DataType:
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return data[0]
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def solve_part_1(data: DataType) -> int:
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size = 4
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for index, window in enumerate(sliding_window(data, size)):
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if not repeating(window):
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return index + size
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return 0
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def repeating(chars: str) -> bool:
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return len(set(chars)) != len(chars)
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def sliding_window(stream: str, size: int) -> Generator[str]:
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for i in range(len(stream) - size):
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yield stream[i : i + size]
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def solve_part_2(data: DataType) -> int:
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size = 14
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for index, window in enumerate(sliding_window(data, size)):
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if not repeating(window):
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return index + size
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return 0
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if __name__ == "__main__":
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main("inputs/day06-test1", expected_part_1=10, expected_part_2=29)
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main("inputs/day06", expected_part_1=1578, expected_part_2=2178)
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