using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string args)
        {
            int n = int.Parse(Console.ReadLine());
            int steps = 1;
            Console.Write(doit(n, steps));
            Console.ReadKey();
        }
        static int doit(int n, int steps)
        {
            if ((n <= 42) || (steps == 4))
            {
                Console.WriteLine("UR NUMBER UNDER : 42 , OR cannot be 42 in 3 steps");
                return (n);
            }
            if (n / 2 == 0)
            {
                return (doit(n / 2, (steps + 1)));
            }
            else
                if ((n / 3 == 0) || (n / 4 == 0))
                {
                    return doit(((n % 100) / 10) * (n % 10), (steps + 1));
                }
                else
                    if (n / 5 == 0)
                        {
                            return (doit(n - 42, (steps + 1)));
                        }
                    else
                        if ((n == 42) && (steps == 3))
                         {
                              return (n);
                         }
            return (n);
        }
    }
}

if ((n / 3 == 0) || (n / 4 == 0))

if ((n % 3 == 0) || (n % 4 == 0))