using System;

public class Program

{

    public static void Main()

    {

        // ALejandro Campos

        int num, t = 0, a = 0;

        Console.WriteLine("Write as many numbers as you want, but once yopu type a zero you the program will stop and tell you how many numbers were written.");

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

        if (num > a)

            {

                a = num;

            }

        while (num != 0)

        {

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

            if (num > a)

            {

                a = num;

            }

        t++;

        }

        Console.WriteLine("The highest number you wrote is " + a);

    }

}