import java.util.Scanner;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner scanner = new Scanner(System.in);
        String a = scanner.next();
        String  b = scanner.next();
        scanner.close();
        int c = Integer.parseInt(a+b);
        
        int i = 2;
        boolean heiho = false;
        while (i*i<=c){
         
            if(c == i*i){
                heiho = true;
                System.out.println("Yes");
            }   
            i++;
        
        }
            if(heiho == false){    
                 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