using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ExerciceAlgo
{
    class Program
    {
        static void Main(string[] args)
        {
            while (1== 1)
            {
                menu();
            }
        }
        public static void menu()
        {
            Console.WriteLine("Chosir nb à tester");
            int nb = 0;
            nb= int.Parse(Console.ReadLine());
            int i = 0;
            while (nb != 1)
            {

                nb= Syracuse(nb);
                i++;
            }
            Console.WriteLine("Temps de vol : {0}", i);

        }
        public static int Syracuse(int nb)
        {
            if (nb > 0)
            {
                if ((nb%2)==0)
                {
                    return nb / 2;
                }
                else
                {
                    return nb * 3 + 1;
                }
            }
            return 0;
        }
    }
}