13 lines
333 B
Python
13 lines
333 B
Python
def alternateSum(n):
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positiveNumbers = [
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num**2 for num in [i for i in range(1, n + 1) if i % 2 != 0]
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]
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negativeNumbers = [
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-num**2 for num in [i for i in range(1, n + 1) if i % 2 == 0]
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]
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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)) |