class Message {
    int currId;
    string text;
public: 
    Message() : currId{0}, text{} {}
    Message(int id, const string &msgText) : currId{id}, text{msgText} {}
    
    const string& get_text() const {
        return text;
    }
    
    friend bool operator<(const Message &lhs, const Message &rhs)
    {
        return lhs.currId < rhs.currId;
    }
};

class MessageFactory {
    int msgId = 0;
public:
    MessageFactory() {}
    Message create_message(const string& text) {
        return Message{msgId++, text};
    }
};

class Message {
    std::string value;
    long long position;
public: 
    Message() {
        static long long _global_order = 0;
        this->position = _global_order;
        _global_order++;
    }
    const string& get_text() {
        return this->value;
    }
    void set_text(const string& text) {
        this->value = std::string(text);    
    }
    bool operator < (const Message& other){
        return this->position < other.position;
    }
};

class MessageFactory {
public:
    MessageFactory() {}
    Message create_message(const string& text) {
        Message msg;
        msg.set_text(text);
        return msg;
    }
};