12 lines
300 B
Python
12 lines
300 B
Python
#!/usr/bin/env python3
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from math import comb
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lines = (x.strip() for x in open("input.txt"))
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result = 0
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for line in lines:
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numbers = [int(x) for x in line.split(" ")]
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result += sum(((idx+len(numbers))%2*2-1) * comb(len(numbers), idx) * val for idx, val in enumerate(numbers))
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print(result)
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