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.