#include <iostream>

using namespace std;

class Top {
protected:
    int x;
public:
    Top(int n) { x = n; }
    virtual ~Top() {} 
    friend ostream& operator<<(ostream& os, const Top& t) {
        return os << t.x;
    }
};
class Left : virtual public Top {
protected:
    int y;
public:
    Left(int m, int n) : Top(m) { y = n; }
};
class Right : virtual public Top {
protected:
    int z;
public:
    Right(int m, int n) : Top(m) { z = n; }
};
class Bottom : public Left, public Right {
    int w; 
public:
    Bottom(int i, int j, int k, int m): Top(i), Left(0, j), Right(0, k) { w = m; }
    friend ostream& operator<<(ostream& os, const Bottom& b) {
        return os << b.x << ',' << b.y << ',' << b.z<< ',' << b.w;
    }
};
int main() {
    Bottom b(1, 2, 3, 4);
    cout << sizeof b << endl;
    cout << b << endl;
    cout << static_cast<void*>(&b) << endl;
    Top* p = static_cast<Top*>(&b);
    cout << *p << endl;
    cout << p << endl;
    cout << static_cast<void*>(p) << endl;
    cout << dynamic_cast<void*>(p) << endl;
    return 0;
}