Exercise1131_RandomConnections.java

public class Exercise1131_RandomConnections {

	public static void main(String[] args) {
		int n = Integer.parseInt(args[0]); //5
		double p = Double.parseDouble(args[1]); //0.66

		draw(n, p);
	}

	private static void draw(int N, double p) {

		StdDraw.setCanvasSize(1024, 1024);
        StdDraw.setScale(-1.0, 1.0);
        StdDraw.setPenRadius(.015);

		double[][] d = new double[N][2];
        for (int i = 0; i < N; i++) {
            d[i][0] = Math.cos(2 * Math.PI * i / N);
            d[i][1] = Math.sin(2 * Math.PI * i / N);
            StdDraw.point(d[i][0], d[i][1]);
        }

        StdDraw.setPenRadius();

        for (int i = 0; i < N - 1; i++) {
        	for (int j = i + 1; j < N; j++) {
        		if (StdRandom.bernoulli(p)) {
        			StdDraw.line(d[i][0], d[i][1], d[j][0], d[j][1]);
        		}
        	}
        }
	}

}