简单

#include <iostream>
using namespace std;
int main(){
  int g,s,b,i;
    cin>>i;
  	g=i%10;
  	s=i%100/10;
  	b=i/100;
  	if(g*g*g+s*s*s+b*b*b==i)
  	  cout<<"YES";
    else
      cout<<"NO";  
	return 0;