import java.util.Scanner;

public class LogisticMap {

    static double logistic(double c, double x) {
        return (c*x  - c*x*x);
    }

    public static void main(String[] args) {

        Scanner in = new Scanner(System.in);
        System.out.print("Введите параметр C: ");
        double c = in.nextDouble();
        System.out.print("Введите начальное значение X0: ");
        double x0 = in.nextDouble();
        System.out.print("Введите число итераций n: ");
        int n = in.nextInt();

        int N = 2000; // число шагов на графике
        StdDraw.setXscale(-0.3, 4.2);
        StdDraw.setYscale(-0.1, 1.1);

        StdDraw.line(0.0,0.0,4.1,0.0);

        StdDraw.line(4.1,-0.025,4.1,0.025);
        StdDraw.line(4.1,0.025,4.2,0.0);
        StdDraw.line(4.1,-0.025,4.2,0.0);


        StdDraw.line(0.0,0.0,0.0,1.0);

        StdDraw.line(-0.1,1.0,0.1,1.0);
        StdDraw.line(-0.1,1.0,0.0,1.05);
        StdDraw.line(0.1,1.0,0.0,1.05);

        StdDraw.line(1.0,0.0,1.0,-0.025);
        StdDraw.line(2.0,0.0,2.0,-0.025);
        StdDraw.line(3.0,0.0,3.0,-0.025);
        StdDraw.line(4.0,0.0,4.0,-0.025);

        StdDraw.text(1.0,-0.05,"1");
        StdDraw.text(2.0,-0.05,"2");
        StdDraw.text(3.0,-0.05,"3");
        StdDraw.text(4.0,-0.05,"4");
        StdDraw.text(4.07,0.05,"С");

        StdDraw.line(0.0,0.2,-0.1,0.2);
        StdDraw.line(0.0,0.4,-0.1,0.4);
        StdDraw.line(0.0,0.6,-0.1,0.6);
        StdDraw.line(0.0,0.8,-0.1,0.8);

        StdDraw.text(-0.15,1.05,"X");
        StdDraw.text(-0.2,0.2,"0.2");
        StdDraw.text(-0.2,0.4,"0.4");
        StdDraw.text(-0.2,0.6,"0.6");
        StdDraw.text(-0.2,0.8,"0.8");

        StdDraw.enableDoubleBuffering();

        for (;c <= 4.0; c += 4.0 / N) {

            double x = logistic(c, x0);

            // пропуск первых n - 10 точек
            for (int i = 0; i < n - 10; i++)
                x = logistic(c, x);

            // последние 10 точек
            for (int i = 0; i < 10; i++) {
                x = logistic(c, x);
                StdDraw.point(c, x);
            }
            StdDraw.show();
            StdDraw.pause(2);
        }
    }
}