import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String a = sc.next();
        String b = sc.next();
        double sqrt = Math.sqrt(Double.parseDouble(a+b));

        if (sqrt % 1 == 0) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
        sc.close();
    }
}