import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int g = n % 10;
		int s = n / 10 % 10;
		int b = n / 100;
		int s1 = g * g * g + s * s * s + b * b * b;
		if(n == s1){
			System.out.println("YES");
		}else{
			System.out.println("NO");
		}
		sc.close();
	}

}
/**************************************************************
	Problem: 1671
	User: admin
	Language: Java
	Result: Accepted
	Time:643 ms
	Memory:39936 kb
****************************************************************/