void append(const std::string &_d, int _h, int _m, bus_route *_br) { schedule.insert(schedule.end(), std::make_pair(trip_info(_h, _m, _d), _br)); }
void append(const std::string &d, int h, int m, bus_route *br) { schedule.insert(schedule.end(), std::make_pair(trip_info(h, m, d), br)); }