30 lines
729 B
Python
30 lines
729 B
Python
import sys
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lines = sys.stdin.read().splitlines()
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data = [[int(c) for c in line.split()] for line in lines]
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right_values: list[int] = []
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left_values: list[int] = []
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for values in data:
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diffs = [values]
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while any(d != 0 for d in diffs[-1]):
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diffs.append([rhs - lhs for lhs, rhs in zip(diffs[-1][:-1], diffs[-1][1:])])
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rhs: list[int] = [0]
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lhs: list[int] = [0]
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for cx in range(len(diffs) - 1):
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rhs.append(diffs[-cx - 2][-1] + rhs[cx])
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lhs.append(diffs[-cx - 2][0] - lhs[cx])
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right_values.append(rhs[-1])
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left_values.append(lhs[-1])
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# part 1
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answer_1 = sum(right_values)
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print(f"answer 1 is {answer_1}")
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# part 2
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answer_2 = sum(left_values)
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print(f"answer 2 is {answer_2}")
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