import java.util.*;
public class Main{
	public static void main(String[] args){
    	Scanner sc = new Scanner(System.in);
      	String a = sc.next();
      	String b = sc.next();
      	int ab = Integer.parseInt(a + b);
      	String ans = "No";
      	for(int i = 1; i <= 320; i++){
        	if(i*i == ab){
            	ans = "Yes";
              	break;
            }
        }
      	System.out.println(ans);
    }
}
/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