class Program
{
    static void Main(string[] args)
    {
        int input = int.Parse(Console.ReadLine()!);
        string number = "";

        for (int i = 1; i <= input; i++)
        {
            number += i.ToString();
        }

        int count = 0;
        foreach (char c in number)
        {
            count++;
            if (count == input)
            {
                Console.WriteLine(c);
                return;
            }
            
        }
    }
}