class Graphic {

    /**
     * Given two-dimensional coordinates, decide whether the
     * point(x,y) is to be painted in black.
     *
     * This Method is to be overridden in derived classes.
     */
    public boolean black(double x, double y) {
        return false;
    }

    /**
     * Draw the graphic.
     * The graphic is drawn as nx by ny Pixel portable bitmap (to
     * stdout), showing the area in the rectangular with lower left
     * corner (x0,y0) and upper right corner (x0+lengthx,y0+lengthy).
     */
    public void draw(double x0, double y0,
                     double lengthx, double lengthy,
                     int nx, int ny)
    {
		System.out.println("P1");
		System.out.println(nx + " " + ny);

		for (int j=ny-1; j>=0; j--) {
			double y = y0 + (j + 0.5)*lengthy/ny;

			for (int i=0; i<nx; i++) {
				double x = x0 + (i + 0.5)*lengthx/nx;

				if (this.black(x,y)) {
					System.out.print("1 ");
				} else {
					System.out.print("0 ");
				}
			}

			System.out.println();
		}
	}

}