using System;

public class Program

{

    public static void Main()

    {

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

        int a=array[0];

        int b=array[1];

        for (int i=2;i<array.Length;i++){

            if(array[i]>=a){

                b=a;

                a=array[i];

            }

            else if(array[i]<a && array[i]>=b){

                b=array[i];

            }

        // please implement this program        

    }

        Console.WriteLine("{0}",b); 

}

}