using System;

namespace _9.CountTheIntegers
{
    class Program
    {
        static void Main(string[] args)

        {
            int counter = 0;
            for (int i = 0;; i++)
            {
                try
                {
                    var data = int.Parse(Console.ReadLine());
                    counter++;

                }
                catch (Exception)
                {
                    Console.WriteLine(counter);
                    break;

                }

            }

        }
    }
}