import java.util.*;
public class Main{
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
      int a = sc.nextInt();
      int b = sc.nextInt();
      int c = 0;
      if(b<=9) c = a*10+b;
      else if(b <= 99) c = a*100+b;
      else if(b == 100) c = a*1000+100;
      
      int d = (int) Math.sqrt(c);
      
      if(d*d == c) System.out.println("Yes");
      else System.out.println("No");
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz