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

namespace yukicoderTest
{
    class Program
    {
        static void Main(string[] args)
        {
            string str = "285714";
            string input = Console.ReadLine();
            int n = int.Parse(input);
            while(n>6)
            {
                n = n - 6;
            }
            Console.WriteLine(str.Substring(n-1, 1));
        }
    }
}