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.