import java.util.*;
public class Main {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
    
		// 整数の入力
		int a = sc.nextInt();
		int b = sc.nextInt();
        int target = Integer.parseInt("" + a + b);
       
        String ans = "";
        int value = 1;
        while(true) {
          int i = value * value;
          if (i == target) {
            ans = "Yes";
            break;
          } else if (i > target) {
            ans = "No";
            break;
          }
          value++;
        }
    
		// 出力
		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