#include <iostream>
#include <math.h>
using namespace std;

class Punkt
{
  //protected:

    float x, y;

public:

    Punkt(float xx=0, float yy=0)
    {
        x=xx;
        y=yy;
    }
    void Wyslietl()
    {
        cout<<x<<endl<<y<<endl;
    }
};

class Kolo:public Punkt
{
    protected:

    int r;
    int p;

public:
    Kolo(float xx=0, float yy=0, float rr=1)
    :Punkt(xx, yy)
    {
        //x=xx;
        //y=yy;
        r=rr;
        p=M_PI*r*r;
    }
    float pole()
    {
        int p;
        p=M_PI*r*r;
        return p;
    }
    void Wyslietl()
    {
        Punkt::Wyslietl();
        cout<<r<<endl;
        cout<<p<<endl;
    }
};

class Kula: public Kolo
{
    //int p;
    float v;
    public:
    Kula(float xx=0, float yy=0, float rr=1)
    :Kolo(xx, yy, rr)
    {
        //x=xx;
        //y=yy;
        //r=rr;
        p=4*M_PI*r*r;
        v=(4/3)*M_PI*r*r*r;
    }
    /*float pole()
    {
        int p;
        p=4*M_PI*M_PI;
        return p;
    }*/
    void Wyslietl()
    {
        Kolo::Wyslietl();
        cout<<v;
    }
};

int main()
{
    /*cout << "Hello world!" << endl;
    Punkt p1;
    p1.Wyslietl();
    Kolo k1;
    cout<<k1.pole()<<endl;
    k1.Wyslietl();*/
    Kula k2(float=1, float=2, float=3);
    k2.Wyslietl();
    return 0;
}