题解 | #牛牛学数列3#
牛牛学数列3
https://www.nowcoder.com/practice/f65c726d081c4160a9356eabf0dc21d9
n = int(input()) sum = 0 for i in range(1,n+1): sum += (-1)**(i+1)*(1/i) print(f'{sum:.3f}')
牛牛学数列3
https://www.nowcoder.com/practice/f65c726d081c4160a9356eabf0dc21d9
n = int(input()) sum = 0 for i in range(1,n+1): sum += (-1)**(i+1)*(1/i) print(f'{sum:.3f}')
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