include

using namespace std;

int main() {

int n;
cin >> n;
int sum = 0, x = n;
while (n) {
	int a = n % 10;
	n /= 10;
	sum += a * a * a;
}
if (sum == x) {
	cout << "YES";
} else {
	cout << "NO";
}
return 0;

}