import java.util.Scanner;

public class test
{
    static double F (double x)
    {
          x= (x/2)+3;
          return(x);
    }

    public static void main(String[] args)
    {
        char restart;
        double u , r;
        int n , L ;
        Scanner read = new Scanner(System.in);
        do
        {
            n=0;
            System.out.println("rentrez votre terme u0:");
            u = read.nextDouble();
            System.out.println("rentrez la limite");
            L = read.nextInt();
            System.out.println("rentrez votre incertitude");
            r = read.nextDouble();
            while( u<= L-r || u>=L+r)
            {
                u = F(u);
                n++;
            }
            System.out.println("Appartient à ]L-r ;L+r[" + "\n n: " + n+ "\n u: " +u);
            do
            {
                System.out.println("voulez vous recommencer y/n?");
                restart = read.next().charAt(0);
            }while (restart != 'y' && restart !='n' );
        }while (restart == 'y') ;
        System.out.println("Merci au revoir");
        read.close();
    }

}