#include<iostream>
#include<stdio.h>
#include<algorithm>
#include<math.h>
using namespace std;
int main() 
{
	int n;
	cin >> n;
	int bai = n / 100, shi = n % 100 / 10, ge = n % 10;
	if (pow(bai, 3) + pow(shi, 3) + pow(ge, 3) == n)
		printf("YES\n");
	else
		printf("NO\n");
	return 0;
}