using System;

public class Program

{

    public static void Main()

    {

        int[] a = {23,17,37,32,39,20,39};

        Array.Sort(a);

        for (int i = a.Length - 1; i >= 0; i--)  {

            if (a[i] != a[a.Length - 1]){

                Console.WriteLine( "The second maximum integer: {0}", a[i] );

                break;

            }

        }

    }

}