### 2183: 就是签到题XD

[状态] [讨论版] [提交] [命题人:]

In mathematics, we suppose that f(1)=1, f(i)-f(i-1)=1/i, (2<=i<=n)

Input starts with an integer T (≤ 10000), denoting the number of test cases.
Each case starts with a line containing an integer n (2 ≤ n ≤10^7).

For each case, print the case number and the value of f(n). The answer should be rounded to 10 decimal places.

3
2
3
4


Case 1: 1.5000000000
Case 2: 1.8333333333
Case 3: 2.0833333333