public class Map
{
  private double x;
  private double a;

    Map ()
  {
    a = 2.0;
    x = 0.25;
  }

  public void iterate ()
  {
    x = a * x * (1.0 - x);
    return;
  }

  public double getX ()
  {
    return (x);
  }

  public void setX (double z)
  {
    x = z;
    return;
  }

  public void setA (double z)
  {
    a = z;
    return;
  }

  public double getA ()
  {
    return (a);
  }
}