using System;

public class Program

{

    public static void Main()

    {

        //Rodrigo

        int A;

        int B;

        B = 0;

        Console.WriteLine("Write as many numbers as you want but once you write a zero, i´ll tell you how many numbers you wrote");

    A = int.Parse(Console.ReadLine());

    while ( A!= 0)

    {

        A = int.Parse(Console.ReadLine());

        B ++;

    }

            Console.WriteLine("You wrote " + B + " numbers ");   

                 }

}