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64 lines
1.8 KiB
Python
64 lines
1.8 KiB
Python
"""AOC Day 7"""
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import pathlib
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import time
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from collections import defaultdict
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TEST_INPUT = """16,1,2,0,4,2,7,1,2,14"""
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def read_input(input_path: str) -> str:
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"""take input file path and return a str with the file's content"""
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with open(input_path, 'r') as input_file:
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input_data = input_file.read().strip()
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return input_data
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def extract(input_data: str) -> list:
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"""take input data and return the appropriate data structure"""
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return list(map(int, input_data.split(',')))
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def fuel2(crabs: list, mean: int) -> int:
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fuel_sum = 0
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for crab in crabs:
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delta = abs(crab - mean)
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fuel_sum += (delta * (delta + 1)) // 2
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return fuel_sum
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def part1(entries: list) -> int:
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"""part1 solver take the entries and return the part1 solution"""
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crabs = sorted(entries)
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middle_crab = crabs[len(crabs)//2]
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return sum(abs(crab - middle_crab) for crab in crabs)
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def part2(entries: list) -> int:
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"""part2 solver take the entries and return the part2 solution"""
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crabs = sorted(entries)
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mean = sum(crabs)//len(crabs)
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return min(fuel2(entries, mean), fuel2(entries, mean+1))
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def test_input_day_07():
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"""pytest testing function"""
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entries = extract(TEST_INPUT)
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assert part1(entries) == 37
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assert part2(entries) == 168
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def test_bench_day_07(benchmark):
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"""pytest-benchmark function"""
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benchmark(main)
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def main():
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"""main function"""
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input_path = str(pathlib.Path(__file__).resolve().parent.parent) + "/inputs/" + str(pathlib.Path(__file__).stem)
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start_time = time.time()
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input_data = read_input(input_path)
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entries = extract(input_data)
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print("Part 1: %d" % part1(entries))
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print("Part 2: %d" % part2(entries))
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end_time = time.time()
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print("Execution time: %f" % (end_time-start_time))
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if __name__ == "__main__":
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main()
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