class Student {
public:
    Student(string x, int y) {
        name = x;
        age = y;
    }
    Student( ) {

    }
    ~Student() {

    }
    string name;
    int age;

    int flag;

    void set_flag (int f) {
        flag = f;
    }

    bool operator==(const Student &student1) {
        if (flag == 1) return (name == student1.name);
        else return (age == student1.age); // if flag == 2 and ...
    }
    bool operator>(const Student &student1) {
        if (flag == 1) return (name > student1.name);
        else return (age > student1.age);
    }
    bool operator<(const Student &student1) {
        if (flag == 1) return (name < student1.name);
        else return (age < student1.age);
    }
    bool operator<=(const Student &student1) {
        if (flag == 1) return (name <= student1.name);
        else return (age <= student1.age);
    }
    bool operator>=(const Student &student1) {
        if (flag == 1) return (name >= student1.name);
        else return (age >= student1.age);
    }
    bool operator!=(const Student &student1) {
        if (flag == 1) return (name != student1.name);
        else return (age != student1.age);
    }
};

std::ostream &operator<<(std::ostream &os, Student const &student) {
    if (student.flag == 1) return os << student.name;
    else return os << student.age;
}