9 lines
307 B
Python
9 lines
307 B
Python
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def alternateSum(n):
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positiveNumbers = [num**2 for num in [i for i in range(1,n+1) if i % 2 != 0]]
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negativeNumbers = [-num**2 for num in [i for i in range(1,n+1) if i % 2 == 0]]
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return sum(positiveNumbers + negativeNumbers)
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if __name__ == "__main__":
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n = int(input('n: '))
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print(alternateSum(n))
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