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Contest: Task: Related: TaskA TaskC

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