#include <iostream>
using namespace std;

int main() {
	int n, r = 0;
	cin >> n;
	int nb = n;

	while (n != 0) {
		int x = n % 10;
		r += x * x * x;
		n /= 10;
	}

	if (r == nb) {
		cout << "YES";
	} else {
		cout << "NO";
	}
}