#include <iostream>
using namespace std;
class B {
int i;
public:
B() { i = 1; }
virtual int get_i() { return i; }
};
class D : virtual public B {
int j;
public:
D() { j = 2; }
int get_i() { return B::get_i() + j; }
};
class D2 : virtual public B {
int j2;
public:
D2() { j2 = 3; }
int get_i() { return B::get_i() + j2; }
};
class MM : public D, public D2 {
int x;
public:
MM() { x = D::get_i() + D2::get_i(); }
int get_i() { return x; }
};
int main()
{
B* o = new MM();
cout << o->get_i() << "\n";
MM* p = dynamic_cast<MM*>(o);
if (p)
cout << p->get_i() << "\n";
D* p2 = dynamic_cast<D*>(o);
if (p2)
cout << p2->get_i() << "\n";
return 0;
}