#include <iostream>

using namespace std;

class Person {
protected:
    string name;
    int age;

public:
    Person() {}

    Person(string _name, int _age) : name(_name), age(_age) {}

    void get() {
        cout << "name: " << name << endl;
        cout << "age: " << age << endl;
    }

    void set() {
        cout << "name: ";
        cin >> name;
        cout << "age: ";
        cin >> age;
    }
};

class Student : public Person {
protected:
    string university;
    string specialty;

public:
    Student() {}

    Student(string _name, int _age, string _university, string _specialty) : Person(_name, _age),
        university(_university), specialty(_specialty) {}

    void get() {
        Person::get();
        cout << "university: " << university << endl;
        cout << "specialty: " << specialty << endl;
    }

    void set() {
        Person::set();
        cout << "university: ";
        cin >> university;
        cout << "specialty: ";
        cin >> specialty;
    }
};

class Teacher : public Student {
protected:
    int experience;
    float salary;

public:
    Teacher() {}

    Teacher(string _name, int _age, string _university,
        string _specialty, int _experience, float _salary) : Student(_name, _age, _university, _specialty),
        experience(_experience), salary(_salary) {}

    void get() {
        Student::get();
        cout << "experience: " << experience << endl;
        cout << "salary: " << salary << endl;
    }

    void set() {
        Student::set();
        cout << "experience: ";
        cin >> experience;
        cout << "salary: ";
        cin >> salary;
    }
};

class DepartmentChair : public Teacher {
    string department;

public:
    DepartmentChair() {}

    DepartmentChair(string _name, int _age, string _university,
        string _specialty, int _experience, float _salary, string _department) :
        Teacher(_name, _age, _university, _specialty, _experience, _salary),
        department(_department) {}

    void get() {
        Teacher::get();
        cout << "department: " << department << endl;
    }

    void set() {
        Teacher::set();
        cout << "department: ";
        cin >> department;
    }
};

int main() {

    Student student;
    Teacher teacher;
    DepartmentChair departmentChair;

    cout << "Enter info about student:" << endl;
    student.set(); //class Student
    cout << endl << "Info about student:" << endl;
    student.get(); //class Student

    cout << endl << "Enter info about teacher:" << endl;
    teacher.set(); //class Teacher
    cout << endl << "Info about teacher:" << endl;
    teacher.get(); //class Teacher

    cout << endl << "Enter info about department chair:" << endl;
    departmentChair.set(); //class DepartmentChair
    cout << endl << "Info about department chair:" << endl;
    departmentChair.get(); //class DepartmentChair

    return 0;
}