import java.util.*;
public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int n = Integer.parseInt(sc.nextLine().replace(" ", ""));
    if(Math.sqrt(n) == Math.floor(Math.sqrt(n))){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  }
} import java.util.*; util.* java public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int n = Integer.parseInt(sc.nextLine().replace(" ", ""));
    if(Math.sqrt(n) == Math.floor(Math.sqrt(n))){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  }
} Main public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int n = Integer.parseInt(sc.nextLine().replace(" ", ""));
    if(Math.sqrt(n) == Math.floor(Math.sqrt(n))){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  } main {
    Scanner sc = new Scanner(System.in);
    int n = Integer.parseInt(sc.nextLine().replace(" ", ""));
    if(Math.sqrt(n) == Math.floor(Math.sqrt(n))){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int n = Integer.parseInt(sc.nextLine().replace(" ", "")); n Integer.parseInt(sc.nextLine().replace(" ", "")) Integer.parseInt Integer sc.nextLine().replace(" ", "") sc.nextLine().replace sc.nextLine() sc.nextLine sc " " "" if(Math.sqrt(n) == Math.floor(Math.sqrt(n))){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    } Math.sqrt(n) == Math.floor(Math.sqrt(n)) Math.sqrt(n) Math.sqrt Math n Math.floor(Math.sqrt(n)) Math.floor Math Math.sqrt(n) Math.sqrt Math n {
      System.out.println("Yes");
    } System.out.println("Yes") System.out.println System.out System System.out "Yes" {
      System.out.println("No");
    } System.out.println("No") System.out.println System.out System System.out "No" String[] args args public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int n = Integer.parseInt(sc.nextLine().replace(" ", ""));
    if(Math.sqrt(n) == Math.floor(Math.sqrt(n))){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  }
} public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int n = Integer.parseInt(sc.nextLine().replace(" ", ""));
    if(Math.sqrt(n) == Math.floor(Math.sqrt(n))){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  }
} Main
import java.util.*;
public class Main{
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int n = Integer.parseInt(sc.nextLine().replace(" ", ""));
    if(Math.sqrt(n) == Math.floor(Math.sqrt(n))){
      System.out.println("Yes");
    }else{
      System.out.println("No");
    }
  }
}