using System;

public class Program

{

    static int MaxOld(int a, int b)

    {

         if (a > b)

         {

            return a;

         }

        else

        {

            return b;

        }

    }

    static int Max(int[] numbers)

    {

        int m = 0;

         for(int i=0; i<numbers.Length; i++)

         {

            if (numbers[i] > m) 

            {

                m = numbers[i];

            }     

         }

        return m;

    }

    public static void Main()

    {

        int[] arr={9, 2, 12, 8, 0};

        Console.WriteLine(Max(arr));

    }

}