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

class Program
{    
    public static void Main()
    {
        long N = long.Parse(Console.ReadLine().Trim());
        string R = "";

        while (N >= 7)
        {
            R = $"{N % 7}{R}";
            N = N / 7;
        }

        Console.WriteLine($"{N}{R}");
    }    
}