class C {
public:
    C() { cout << "Con: C" << endl; }
    ~C() { cout << "Des: C" << endl; }
};

class B : public C {
public:
    B() { cout << "Con: B" << endl; }
    ~B() { cout << "Des: B" << endl; }
};

class A : public B {
public:
    A() { cout << "Con: A" << endl; }
    ~A() { cout << "Des: A" << endl; }
};

int main(){
    A* obj = new A();
    delete obj;
}