Tohu wants to enter Moscow State University, and he must pass the math exam. He does not know math, and asks you to help him. The problem is to find the sum of the sequence
on condition
First line contains single integer T <= 20000 - the number of test cases.
Each of the next T lines contains single integer 1 <= n <= 10^9.
For each n output the value with 11 digits after decimal point.
Input:
2
2
5
Output: 0.70833333333
0.73809523810