using System.Collections.Generic;
using System;

public class Hello
{
    public static void Main()
    {
        var n = int.Parse(Console.ReadLine().Trim());
        Console.WriteLine(getAns(n, 7));
    }
    public static string getAns(int n, int a)
    {
        var t = new List<int>();
        while (n >= a)
        {
            t.Add(n % a);
            n /= a;
        }
        t.Add(n);
        t.Reverse();
        return string.Join("", t);
    }
}