49 lines
946 B
Python
49 lines
946 B
Python
def read_file():
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with open("input.txt","r") as f:
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return list(map(int, f.read().split('\n')))
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def has_summing_pair(target, numbers):
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for number in numbers:
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if target - number in numbers:
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return True
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return False
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def part1(numbers):
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for i, number in enumerate(numbers):
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if i < 25:
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continue
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past_25_numbers = numbers[i-25:i]
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if not has_summing_pair(number, past_25_numbers):
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return number
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def find_contiguous_sum(target, numbers):
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start = 0
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end = 0
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for i, _ in enumerate(numbers):
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start = i
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n = i
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s = target
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while True:
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s -= numbers[n]
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if s == 0:
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end = n
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break
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if s < 0:
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break
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n += 1
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if end:
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break
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return min(numbers[start:end]), max(numbers[start:end])
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def part2(numbers):
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target = part1(numbers)
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low, high = find_contiguous_sum(target, numbers)
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return low + high
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def main():
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numbers = read_file()
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print(part1(numbers), part2(numbers))
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if __name__ == "__main__":
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main() |