using System;

public class Program

{

    public static void Main()

    {

        //Console.WriteLine("Hello World");

        int [] a = {4, 5, 6, 7, 8};

        int max_1 = int.MinValue, max_2 = int.MinValue;

        if(a.Length < 2)

            Console.WriteLine("Array length is smaller than 2");

        else

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

                if(a[i] > max_2){

                    max_2 = a[i];

                    if(max_2 > max_1){

                        int temp = max_2;

                        max_2 = max_1;

                        max_1 = temp;

                    }

                }

            }

        Console.WriteLine("2nd maximum number is {0}", max_2);

    }

}