public class Carpet { 

    // Draw a 2*size by 2*size Sierpinski carpet of level n
    // having its center at (x,y).
    

static void carpet(double x, double y, double size, int n) {

            StdDraw.filledSquare(x, y, size);

    }

    public static void main(String[] args) { 
        int n = Integer.parseInt(args[0]);
        carpet(0.5, 0.5, 0.5, n);
    }
}