#include <iostream>
using namespace std;

class Shape
{
public:
    virtual void draw()
    {
        cout << "Shape" << endl;
    }
};

class Circle : public Shape
{
public:
    void draw()
    {
        cout << "Circle" << endl;
    }
};

class Square : public Shape
{
public:
    void draw()
    {
        cout << "Square" << endl;
    }
};

int main()
{
    Shape *s;
    Circle c;
    Square q;
    s = &c;
    s->draw();
    s = &q;
    s->draw();
    return 0;
}