#include <istream>

class point {
public:
    point(int x, int y)
        : x_ { x }
        , y_ { y } {};
    point& operator=(point const& p);

private:
    int x_;
    int y_;
};

point& point::operator=(point const& p)
{
    x_ = p.x_;
    y_ = p.y_;
    return *this;
}