import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        String concat = sc.next() + sc.next();
        long result = Math.round(Math.sqrt(Integer.parseInt(concat)));
        if (result * result == Integer.parseInt(concat)) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} import java.util.*; util.* java public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        String concat = sc.next() + sc.next();
        long result = Math.round(Math.sqrt(Integer.parseInt(concat)));
        if (result * result == Integer.parseInt(concat)) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} Main public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        String concat = sc.next() + sc.next();
        long result = Math.round(Math.sqrt(Integer.parseInt(concat)));
        if (result * result == Integer.parseInt(concat)) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    } main {
        Scanner sc = new Scanner(System.in);
        String concat = sc.next() + sc.next();
        long result = Math.round(Math.sqrt(Integer.parseInt(concat)));
        if (result * result == Integer.parseInt(concat)) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    } Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String concat = sc.next() + sc.next(); concat sc.next() + sc.next() sc.next() sc.next sc sc.next() sc.next sc long result = Math.round(Math.sqrt(Integer.parseInt(concat))); result Math.round(Math.sqrt(Integer.parseInt(concat))) Math.round Math Math.sqrt(Integer.parseInt(concat)) Math.sqrt Math Integer.parseInt(concat) Integer.parseInt Integer concat if (result * result == Integer.parseInt(concat)) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        } result * result == Integer.parseInt(concat) result * result result result Integer.parseInt(concat) Integer.parseInt Integer concat {
            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) throws Exception {
        Scanner sc = new Scanner(System.in);
        String concat = sc.next() + sc.next();
        long result = Math.round(Math.sqrt(Integer.parseInt(concat)));
        if (result * result == Integer.parseInt(concat)) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        String concat = sc.next() + sc.next();
        long result = Math.round(Math.sqrt(Integer.parseInt(concat)));
        if (result * result == Integer.parseInt(concat)) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
} Main
import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner(System.in);
        String concat = sc.next() + sc.next();
        long result = Math.round(Math.sqrt(Integer.parseInt(concat)));
        if (result * result == Integer.parseInt(concat)) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
}
