import java.util.Scanner;

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

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