#include <iostream>
using std::string;
#include<vector>
#include <algorithm>
#include <set>
#include <string>
#include <cstring>
#include <map>

using namespace std;
class Person{
public:
    string email;
    string name;
    string surname;
    Person(string email_,string name_,string surname_):email(email_),name(name_),surname(surname_){};
    ~Person()=default;
};

class SG{
private:
    vector<Person> lista_osob;
    map<string,set<string>> obsertwatorzy;
public:
    SG()=default;
    ~SG()=default;

    bool addPerson(const char *email,const char *name, const char *surname) {
        /*Person osoba(email,name,surname);
        for(int i=0; i< lista_osob.size(); i++){
            if (lista_osob[i].email == string(email) ){
                return false;
            }
        }
        lista_osob.push_back(osoba); */
        /// Z STL///
        Person osoba(email, name, surname);
        auto check=find(lista_osob.begin(), lista_osob.end(),
                        [&email](const Person &osoba) { return osoba.email == email; });
        if (check == lista_osob.end()) {
            lista_osob.push_back(osoba);
        }else { return false;}
    }
    bool removePerson(const char *email){
        obsertwatorzy.erase(string(email));

        for (int i=0;i<lista_osob.size(); i++){
            if(lista_osob[i].email == email){
                lista_osob.erase(lista_osob.begin()+i);
                break;
            }
        }


    }

    bool addFollower(const char *emailFrom,const char *emailTo){
        //powinno się sprawdzic czy osoba istnieje!
        auto check= find (lista_osob.begin(),lista_osob.end(),string(emailFrom));
        if (check == lista_osob.end()){cout<<"brak osoby" << endl;}
        obsertwatorzy.insert(pair<string,string>(string(emailFrom),string(emailTo)));

    }

    bool unfollow(const char *emailFrom,const char *emailTo){
        auto znaleziony =obsertwatorzy.find(string(emailFrom));
        znaleziony->second.clear();
        }

        set<string> getDirectFollowers(const char *email){
            auto znaleziony =obsertwatorzy.find(string(email));
            return znaleziony->second;
            }






        set<string> getAllFollowers(const char *email){
            set<string> zbior;
            auto znaleziony =obsertwatorzy.find(string(email));
            zbior=znaleziony->second;
            for (int i=0; i< zbior.size();i++){


            }

        }


    };