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

class No499
{
    static void Main()
    {
        var ans = new Stack<int>();
        var n = Int32.Parse(Console.ReadLine());
        while (true)
        {
            ans.Push(n % 7);
            if(n<7)break;
            n /= 7;
        }
        foreach (var a in ans)
        {
            Console.Write(a);
        }
        Console.WriteLine();
    }
}