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

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            var n = int.Parse(Console.ReadLine());
            var sb = new StringBuilder();
            do
            {
                sb.Insert(0, n % 7);
                n /= 7;
            } while (n > 0);
            Console.WriteLine(sb.ToString());
        }
    }
}