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Score : $200$ points

### 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