Problem1217--计算t=1+1/2+1/3+...+1/n

1217: 计算t=1+1/2+1/3+...+1/n

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Time Limit : 1.000 sec  Memory Limit : 128 MiB

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Description

计算t=1+1/2+1/3+...+1/n

Input

整型变量n

Output

t(保留六位小数)

Sample Input Copy 

10

Sample Output Copy 

2.928968

Source/Category

admin 
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