using System;

public class Program
{
    static void Main()
    {
        string Result = "";
        var Input = long.Parse(Console.ReadLine());
        long Mod = 0;
        do{
            Mod = (Input % 7);
            Result = Mod + Result;
            Input = (Input - Mod) / 7;
        }while(Input > 0);
        
        Console.WriteLine(Result);
    }
}