using System;

public class Program

{

    public static void Main()

    {

        int[] liste = { 10, 55, 33, 30, 47, 21 };

​

        int plusGrandN = liste[0];

​

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

        {

            if (liste[i] > plusGrandN)

            {

                plusGrandN = liste[i];

            }

        }

​

        Console.WriteLine(plusGrandN);

    }

}