Squarefree number

In mathematics, a squarefree number is one which is divisible by no perfect squares, except 1. For example, 10 is square-free but 18 is not, as it is divisible by 9 = 3^2. Now you need to determine whether an integer is squarefree or not.

The first line contains an integer T indicating the number of test cases.
For each test case, there is a single line contains an integer N.

Technical Specification

1. 1 <= T <= 20
2. 2 <= N <= 10^18

For each test case, output the case number first. Then output "Yes" if N is squarefree, "No" otherwise.

2
30
75

Case 1: Yes
Case 2: No

hanshuai

The 6th Central China Invitational Programming Contest and 9th Wuhan University Programming Contest Final