100861: [AtCoder]ABC086 B - 1 21

Problem Statement

AtCoDeer the deer has found two positive integers, $a$ and $b$. Determine whether the concatenation of $a$ and $b$ in this order is a square number.

Constraints

• $1$ $≤$ $a,b$ $≤$ $100$
• $a$ and $b$ are integers.

Input

Input is given from Standard Input in the following format:

$a$ $b$

Output

If the concatenation of $a$ and $b$ in this order is a square number, print Yes; otherwise, print No.

Sample Input 1

1 21

Sample Output 1

Yes

As $121$ $=$ $11$ × $11$, it is a square number.

Sample Input 2

100 100

Sample Output 2

No

$100100$ is not a square number.

Sample Input 3

12 10

Sample Output 3

No