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B - 1 21

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.

1 21

Yes

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

100 100

No

$100100$ is not a square number.

12 10

No