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

namespace test_2
{
    class Program
    {
        static void Main(string[] args)
        {
            int d = int.Parse(Console.ReadLine());
            string x = "";

            for(int i = 0; i < d; i++)
            {
                x += i.ToString();
            }

            Console.WriteLine(x[d]);
        }
    }
}