using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            int N = int.Parse(Console.ReadLine());
            int answer = 0;
            int a = 1;
            while(true) 
            {
                answer += (N % 7) * a;
                if(N % 7 == 0 && N / 7 == 0)
                {
                    break;
                }
                N = N / 7;
                a *= 10;
            }
            Console.WriteLine(answer);
        }
    }
}