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

namespace YukiCoder
{
    class Program
    {
        static void Main(string[] args)
        {
            int nn = int.Parse(Console.ReadLine());
            //while (nn > 0)
            string S = "";
            for (; nn > 0; nn /= 7)
            {
                S = nn % 7 + S;
            }
            if (S == "") S = "0";
            Console.WriteLine(S);
            Console.ReadLine();
        }
    }
}