#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,a,b,c,s;
	cin>>n;
	a=n/100%10;
	b=n/10%10;
	c=n%10;
	s=a*a*a+b*b*b+c*c*c;
	if(s==n){
		cout<<"YES"<<endl;
	}else{
		cout<<"NO"<<endl;
	}
}
/**************************************************************
	Problem: 1671
	User: admin
	Language: C++
	Result: Accepted
	Time:15 ms
	Memory:2072 kb
****************************************************************/