import java.util.Scanner;

public class Main {
  public static void main(String args[]) {
    Scanner acd = new Scanner(System.in);
    int n,a,b,c;
    a=acd.nextInt();
    b=acd.nextInt();
    if(b/100>0)
      n = a * 1000 + b;
    else if(b/10>0)
      n = a * 100 + b;
    else 
      n = a * 10 + b;
    for(c = 1;c < 317 && c * c != n; c++);
    if(c==317)
      System.out.println("No");
    else 
      System.out.println("Yes");
}   
}

/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