UVa 10302

#include<bits/stdc++.h>
#define ll long long

using namespace std;

int main()
{ ll a[50005];
 a[1]=1;
 for(ll i=2; i<=50005; i++)
 {
  a[i]=a[i-1]+(i*i*i);
 }

 ll n;
 while(cin>>n)
 {
  cout<<a[n]<<endl;
 }
 return 0;
}