import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String a = sc.next();
		a += sc.next();
		int n = Integer.parseInt(a);
		boolean b = false;
		for (int i = 1; i * i <= n; i++) {
			if (n == i * i) {
				b = true;
				break;
			}
		}
		if (b) {
			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);
		String a = sc.next();
		a += sc.next();
		int n = Integer.parseInt(a);
		boolean b = false;
		for (int i = 1; i * i <= n; i++) {
			if (n == i * i) {
				b = true;
				break;
			}
		}
		if (b) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}
} Main public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String a = sc.next();
		a += sc.next();
		int n = Integer.parseInt(a);
		boolean b = false;
		for (int i = 1; i * i <= n; i++) {
			if (n == i * i) {
				b = true;
				break;
			}
		}
		if (b) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	} main {
		Scanner sc = new Scanner(System.in);
		String a = sc.next();
		a += sc.next();
		int n = Integer.parseInt(a);
		boolean b = false;
		for (int i = 1; i * i <= n; i++) {
			if (n == i * i) {
				b = true;
				break;
			}
		}
		if (b) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	} Scanner sc = new Scanner(System.in); sc new Scanner(System.in) String a = sc.next(); a sc.next() sc.next sc a += sc.next() a sc.next() sc.next sc int n = Integer.parseInt(a); n Integer.parseInt(a) Integer.parseInt Integer a boolean b = false; b false for (int i = 1; i * i <= n; i++) {
			if (n == i * i) {
				b = true;
				break;
			}
		} int i = 1; int i = 1; i 1 i * i <= n i * i i i n i++ i++ i {
			if (n == i * i) {
				b = true;
				break;
			}
		} {
			if (n == i * i) {
				b = true;
				break;
			}
		} if (n == i * i) {
				b = true;
				break;
			} n == i * i n i * i i i {
				b = true;
				break;
			} b = true b true break; if (b) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		} b {
			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);
		String a = sc.next();
		a += sc.next();
		int n = Integer.parseInt(a);
		boolean b = false;
		for (int i = 1; i * i <= n; i++) {
			if (n == i * i) {
				b = true;
				break;
			}
		}
		if (b) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}
} public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		String a = sc.next();
		a += sc.next();
		int n = Integer.parseInt(a);
		boolean b = false;
		for (int i = 1; i * i <= n; i++) {
			if (n == i * i) {
				b = true;
				break;
			}
		}
		if (b) {
			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);
		String a = sc.next();
		a += sc.next();
		int n = Integer.parseInt(a);
		boolean b = false;
		for (int i = 1; i * i <= n; i++) {
			if (n == i * i) {
				b = true;
				break;
			}
		}
		if (b) {
			System.out.println("Yes");
		} else {
			System.out.println("No");
		}
	}
}
