浙大Python 第4章-8 求分数序列前N项和 (15 分)

原题题目

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代码实现

numbers = int(input());d,n,sum = 2,1,0
for i in range(numbers):
    sum += d/n
    temp = n;n = d;d+=temp
print("%.2f"%sum)

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提交结果