#include<bits/stdc++.h> 
using namespace std;
int main(){
    int n,g,s,b,x;
	cin>>n;
	g=n%10;
	s=n/10%10;
	b=n/100;
	x==g*g*g+s*s*s+b*b*b;
	if(n==x){
		cout<<"YES";
	}else{
		cout<<"NO";
	} 
	 
} 
/**************************************************************
	Problem: 1671
	User: yangjunwen
	Language: C++
	Result: Wrong Answer
****************************************************************/