import java.util.*;
public class Main{
        public static void main(String[] args){
                Scanner sc = new Scanner(System.in);
                int a = sc.nextInt();
                int b = sc.nextInt();
                int k = (int)Math.log10(b) + 1;
                a = (int)(a * Math.pow(10 , k) + b);
                double yono = Math.sqrt(a);
                if(yono - Math.ceil(yono) == 0){
                        System.out.println("Yes");
                }else{
                        System.out.println("No");
                }
        }
}
//腹痛は治りました
//今日はAtCoderをそんなにできそうにありません import java.util.*; util.* java public class Main{
        public static void main(String[] args){
                Scanner sc = new Scanner(System.in);
                int a = sc.nextInt();
                int b = sc.nextInt();
                int k = (int)Math.log10(b) + 1;
                a = (int)(a * Math.pow(10 , k) + b);
                double yono = Math.sqrt(a);
                if(yono - Math.ceil(yono) == 0){
                        System.out.println("Yes");
                }else{
                        System.out.println("No");
                }
        }
} Main public static void main(String[] args){
                Scanner sc = new Scanner(System.in);
                int a = sc.nextInt();
                int b = sc.nextInt();
                int k = (int)Math.log10(b) + 1;
                a = (int)(a * Math.pow(10 , k) + b);
                double yono = Math.sqrt(a);
                if(yono - Math.ceil(yono) == 0){
                        System.out.println("Yes");
                }else{
                        System.out.println("No");
                }
        } main {
                Scanner sc = new Scanner(System.in);
                int a = sc.nextInt();
                int b = sc.nextInt();
                int k = (int)Math.log10(b) + 1;
                a = (int)(a * Math.pow(10 , k) + b);
                double yono = Math.sqrt(a);
                if(yono - Math.ceil(yono) == 0){
                        System.out.println("Yes");
                }else{
                        System.out.println("No");
                }
        } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) int a = sc.nextInt(); a sc.nextInt() sc.nextInt sc int b = sc.nextInt(); b sc.nextInt() sc.nextInt sc int k = (int)Math.log10(b) + 1; k (int)Math.log10(b) + 1 (int)Math.log10(b) Math.log10 Math b 1 a = (int)(a * Math.pow(10 , k) + b) a (int)(a * Math.pow(10 , k) + b) a * Math.pow(10 , k) a Math.pow(10 , k) Math.pow Math 10 k b double yono = Math.sqrt(a); yono Math.sqrt(a) Math.sqrt Math a if(yono - Math.ceil(yono) == 0){
                        System.out.println("Yes");
                }else{
                        System.out.println("No");
                } yono - Math.ceil(yono) == 0 yono - Math.ceil(yono) yono Math.ceil(yono) Math.ceil Math yono 0 {
                        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 a = sc.nextInt();
                int b = sc.nextInt();
                int k = (int)Math.log10(b) + 1;
                a = (int)(a * Math.pow(10 , k) + b);
                double yono = Math.sqrt(a);
                if(yono - Math.ceil(yono) == 0){
                        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 a = sc.nextInt();
                int b = sc.nextInt();
                int k = (int)Math.log10(b) + 1;
                a = (int)(a * Math.pow(10 , k) + b);
                double yono = Math.sqrt(a);
                if(yono - Math.ceil(yono) == 0){
                        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 a = sc.nextInt();
                int b = sc.nextInt();
                int k = (int)Math.log10(b) + 1;
                a = (int)(a * Math.pow(10 , k) + b);
                double yono = Math.sqrt(a);
                if(yono - Math.ceil(yono) == 0){
                        System.out.println("Yes");
                }else{
                        System.out.println("No");
                }
        }
}
//腹痛は治りました
//今日はAtCoderをそんなにできそうにありません