#include <iostream>
#include <vector>
#include <string>

using namespace std;

class Student
{
private:
        int age;
        string name;

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

        void print_age()
            { cout<<"Name: "<<name<<" Age: "<<age<<endl;}
};

class StudentGroup
{
private:
        vector<Student *> *students;
public:
        StudentGroup()
        {
            //cout<<"new vector<Student *>"<<endl;
            students=new vector<Student *>;
        }

        ~StudentGroup()
        {
            int imax=students->size();
            for(int i=0;i<imax;i++)
            {
                //cout<<"delete: "<<i<<endl;
                delete students->at(i);
            }

            //cout<<"delete vector<Student *> "<<endl;
            delete students;
        }

        void add_student(int age, string name="")
        {
            students->push_back(new Student(age, name));
        }

        void print_students()
        {
            int imax=students->size();
            cout<<"Amount of students: "<<imax<<endl;
            for(int i=0;i<imax;i++)
            {
                cout<<i+1<<" - ";
                students->at(i)->print_age();
            }
        }
};

int main()
{
	StudentGroup *p21v2=new StudentGroup();
	p21v2->add_student(18);
	p21v2->add_student(19,"Kolya");
	p21v2->add_student(22,"Sereja");

	p21v2->print_students();
	cout<<endl;

    delete p21v2;
	return 0;
}