#include <bits/stdc++.h>
using namespace std;
int main(int argc, char const *argv[])
{
	int n ;
	cin >> n ;
	int tmp = n ; 
	int a,b,c ;
	a = n % 10 ;
	n /= 10 ;
	b = n % 10 ;
	n /= 10 ;
	c = n ;
	if(a*a*a+b*b*b+c*c*c == tmp) cout << "YES\n" ;
	else cout << "NO\n" ;
	return 0;
}