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

namespace ConsoleApp3
{
    class Program
    {
        static void F(int n)
        {
            if (n > 0)
            {
                F(n / 4);
                Console.Write(n);
                F(n - 1);
            }
        }
        static void Main(string[] args)
        {
            F(5);
        }
    }
}