Given a number N. Your task is to find out N is Square Number or not.

Square Number is an integer that is the square of an integer, in other words, it is the product of some integer with itself. For example, 16 is a square number, since it can be written as 4 × 4.

Input:
Input contains a single integer N.

Output:
Print YES if N is Square Number else print NO.

Constraints:

Test Files 1 to 5
1<=N<=10³

Test Files 6 to 10
1<=N<= 10¹⁰

Sample Input #1:
20

Sample Output #1:
NO

Sample Input #2:
36

Sample Output #2:
YES