class Point2D {
    int x, y;

    public Point2D(int x, int y) {
        this.x = x;
        this.y = y;
    }

    double dist2D(Point2D p) {
        return (int)(Math.ceil( (float) Math.sqrt( (p.x - this.x) * (p.x - this.x) + (p.y - this.y) * (p.y - this.y) )));
    }

    void printDistance(double d) {
        System.out.println("2D distance = " + (int)d);
    }
}

class Point3D extends Point2D {
    int z;
    public Point3D(int x, int y) {
        this(x, y, 0);
    }
    public Point3D(int x, int y, int z) {
        super(x, y);
        this.z = z;
    }
    double dist3D(Point3D p) {
        return (int) (Math.ceil( (float) Math.sqrt( (p.x - this.x) * (p.x - this.x) + (p.y - this.y) * (p.y - this.y) + (p.z - this.z) * (p.z - this.z) )));
    }
    void printDistance(double d) {
        System.out.println("3D distance = " + (int)d);
    }

}