using System;

public class Program

{

    public static void Main()

    {

        //Alejandro Romo Contreras

        int x,y;

        y=0;

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

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

        while (x!=0) 

        {

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

        y++;

        }

​

        Console.WriteLine("You wrote " + y + " numbers before writing a zero.");

    }

}