#include<iostream>
using namespace std;
	int main(){
	long long a;
	bool c=false;
	cin>>a;
	for(long long b=0;b<a;b++){
		if(b*b*b==a){
		c=true;
		break;	
		}
			}
		if(c==true) cout<<"YES"<<endl;
		else cout<<"NO"<<endl;
	return 0;
}