using System;

​

public class Program

{

    public static void Main()

    {

        int[] arr = {1, 2, 3, 7, 6, 12, 5};

        int max = arr[0];

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

        {

            if (arr[i] > max)

            {

                max = arr[i];

            }

        }

​

        Console.WriteLine(max);

    }

}