#include <iostream>
using namespace std;
class Base {
public:
    virtual void show() {
        cout << "Base";
    }
};
class Derived : public Base {
public:
    void show() override {
        cout << "Derived";
    }
};
int main() {
    Base* p = new Derived();
    p->show();
    delete p;
    return 0;
}