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

namespace Contest
{
	class Program
	{
		static void Main(string[] args)
		{
			int N = int.Parse(Console.ReadLine());
			var ans = string.Empty;
			for (int i = N; i > 0; i /= 7)
			{
				ans = (i % 7).ToString() + ans;
			}
			Console.WriteLine(ans);
		}
	}
}