salibek_lab2

#include <iostream>
#include <cstdlib>
#include <vector>
#include <map>
#include <set>
#include <functional>

using namespace std;

class Product{
    public : Product(string cfc, string ctc, string c, string n){
        country_from_code = cfc;
        country_to_code = ctc;
        code = c;
        num = n;
    }

    public : string country_from_code;
    public : string country_to_code;
    public : string code;
    public : string num;

    public : bool check(string abbr){
        return *country_from_code.begin() == *abbr.begin() &&
                *country_to_code.begin() == *(abbr.begin()+1) &&
                 *code.begin() == *(abbr.begin()+2);
    }

    public : string get_str_code(){
        return this->country_from_code + " " + this->country_to_code + " " + this->code;
    }
};

int main()
{
    vector<Product> products = {
        *(new Product("FR742", "BEL1254", "TR4587", "1236547")),
        *(new Product("RU1254", "FR4567", "GT12454", "1236548")),
        *(new Product("FR654", "GER4526", "LK1245", "1236549")),
        *(new Product("FR742", "BEL1254", "TR4587", "1236550")),
        *(new Product("FIN1254", "BUL252", "TW1247", "1236551"))
    };

    map<string, int> m;

    for (auto& p : products)
        if (p.check("FBT") && m.find(p.get_str_code()) == m.end())
            m.insert(make_pair(p.get_str_code(), 1));
        else
            (m.find(p.get_str_code()))->second++;

    typedef function<bool(pair<string, int>, pair<string, int>)> Comparator;

    Comparator compFunctor =
            [](pair<string, int> elem1, pair<string, int> elem2)
            {
                return elem1.second > elem2.second;
            };

    set<pair<string, int>, Comparator> s(
            m.begin(), m.end(), compFunctor);

    for (auto& p : s)
        cout << p.first << " " << p.second << endl;

    return 0;
}