#include<bits/stdc++.h>
using namespace std;
int main()
{
    int N,lanterns,joytokens,points,banners;
    cout<<"Enter a number= ";
    cin>>N;
    joytokens= N%500;
    banners = joytokens/5;
    lanterns = N/500;
    points =(banners*5)+(lanterns*1000);
    cout<<"Maximum number of festivity points: "<<points;
    return 0;
}