#include <iostream>

using namespace std;

class Human
{

protected:

    string surname;
    string name;
    string midname;
    int age;

public:

    Human()
    {
        surname = "Ivanov";
        name = "Ivan";
        midname = "Ivanovich";
        age = 18;
    }

    Human(const string &surname, const string &name, const string &midname, int age)
    : surname(surname), name(name), midname(midname), age(age) {}

    virtual void print() = 0;

    ~Human(){}

};

class Student : public Human
{

private:

    bool on_lesson;

public:

    Student() : Human()
    {
        on_lesson = false;
    }

    Student(const string &surname, const string &name, const string &midname, int age, bool on_lesson)
            : Human(surname, name, midname, age), on_lesson(on_lesson) {}

    void print() override {
        cout << "Name: " << name << endl
             << "Surmane: " << surname << endl
             << "Midname: " << midname << endl
             << "Age: " << age << endl
             << "Is he/she on lesson: " << boolalpha << on_lesson << endl;
    }

    ~Student(){}

};

class Boss : public Human
{

private:

    int number_of_workers;

public:

    Boss() : Human()
    {
        number_of_workers = 0;
    }

    Boss(const string &surname, const string &name, const string &midname, int age, int number_of_workers)
            : Human(surname, name, midname, age), number_of_workers(number_of_workers) {}

    void print() override {
        cout << "Name: " << name << endl
             << "Surmane: " << surname << endl
             << "Midname: " << midname << endl
             << "Age: " << age << endl
             << "Number of workers: " << number_of_workers << endl;
    }

    ~Boss(){}

};

int main() {

    Student s;
    Boss b;

    s.print();
    cout << endl;
    b.print();

    return 0;
}