#include<bits/stdc++.h>

using namespace std;

int main(){

int n,b,s,g;

cin>>n;

b=n/100;

s=n/10%10;

g=n%10;

if(b*b*b+s*s*s+g*g*g==n){

	cout<<"YES"<<endl;
  
}else{

	cout<<"NO"<<endl;

}

return 0;

}