class web_server
{
    int limit ;
    list < string > history;
    unordered_map < string, list < string > :: iterator > website_pointer;
    // std::priority_queue<int, std::vector<int>, std::greater<int> > my_min_heap;
    priorety_queu <pair <int , string>, vector <pair <int , string>, greater<int>  >  top_five;
    unordered_map < string, int > inside_queu;

  public:
    web_server (int capacity)
    {
        limit = capacity;
    }

    void visit (string site)
    {
        update_top_five(site);
        update_history (site);
    }
    void update_history (string site)
    {
        if (history.size() == limit && website_pointer.count(site) == 0 )
        {
            string name_del = history.back();
            history.pop_back();
            website_pointer.erase(name_del);
        }

        if (website_pointer.count(site) > 0)
        {
            list < string > :: iterator pointer_del = website_pointer[site];
            website_pointer.erase(site);
            history.erase(pointer_del);
        }
        history.push_front(site);
        website_pointer[site] = history.begin();
    }
    list <string> get_history()
    {
        return history;
    }

};
/*

list of web_sites
unordeed_map < web_sites, addres_list>
*/

int main() {
    std::cout << "Hello World!\n";
}