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

class Program
{
    static void Main(string[] args)
    {
        new Magatro().Solve();
    }
}

public class Magatro
{
    public void Solve()
    {
        int n = int.Parse(Console.ReadLine());
        if (n == 0)
        {
            Console.WriteLine(0);
            return;
        }
        string ans = "";
        while (n > 0)
        {
            ans = n % 7 + ans;
            n /= 7;
        }
        Console.WriteLine(ans);
    }
}