using System;

public class Program

{

    public static void Main()

    {

        //Method method = new Method();

        int num;

        Console.WriteLine("Input: ");

        string ipt = Console.ReadLine();

        num = int.Parse(ipt);

        do

        {

            if(num == 1)

            {

             num = 0;

            }

​

            else if(num % 2 == 1)

            {

                num = num *3 +1;

            }

            else

            {

                num = num / 2;  

            }

            Console.WriteLine(num);

        }

        while(num != 1);

    }

}

​