class Point implements Serializable, Cloneable {

    public static double distanceSq(double x1, double y1, double x2, double y2) {
        x2 -= x1;
        y2 -= y1;
        return x2 * x2 + y2 * y2;
    }

    public  Point();
    public  Point(int x, int y);
    public  Point(double x, double y);
    public  Point(Point p);

}