#include <iostream>

using namespace std;
class TwoDim
{
public:
    TwoDim(int x, int y)
    {
        px=new int;
        py=new int;
        *px=x;
        *py=y;
    }
    void set(int x, int y)
    {
        *px=x;
        *py=y;
    }
private:
    int *px, *py;
    friend ostream& operator<<(ostream& o, const TwoDim t);


};

ostream& operator<<(ostream& o, const TwoDim t)
{
    *t.px=1;
    *t.py=2;
    o << *t.px << " " << *t.py;
    return o;
}


int main()
{
    TwoDim x(1,2), y(10,20);
    cout<<x;
    x=y;
    x.set(100,200);
    y.set(1000,2000);
    cout<<x<<endl;
    return 0;
}