#include <iostream>

class KlasaA
{
    protected:
 int x, y;
    public:
 KlasaA (int xx=0, int yy = 0) : x(xx), y(yy) {}
 virtual int DajX() const { return x; }
 virtual int DajY() const { return y; }
 virtual ~KlasaA(){};
};
class KlasaB :public KlasaA {
 int z;
 public:
 KlasaB (int x, int y, int z=0):KlasaA(x, y),z(z){}
 int DajX()const override { return x + z; }
 int DajY()const override { return y + z; }
 int DajZ()const { return z; }
};
int main()
{
 KlasaA ka1(2,1), ka2(5, 3), ka3 (3);
 KlasaB kb1(1,2,3), kb2(1,2), kb3 (4, 2, 1);
 std::cout << ka1.DajX() << " " << ka1.DajY() << std::endl; // 2 1
 std::cout << ka2.DajX() << " " << ka2.DajY() << std::endl; // 5 3
 std::cout << ka3.DajX() << " " << ka3.DajY() << std::endl; // 3 0
 std::cout << kb1.DajX() << " " << kb1.DajY() << " " << kb1.DajZ() << "\n"; // 4 5 3
 std::cout << kb2.DajX() << " " << kb2.DajY() << " " << kb2.DajZ() << "\n"; // 1 2 0
 std::cout << kb3.DajX() << " " << kb3.DajY() << " " << kb3.DajZ() << "\n"; // 5 3 1
 return 0;
}