using System;

public class Program

{

    public static void Main()

    {

        Console.Write("Input size of array: ");

        int size = int.Parse(Console.ReadLine());

        int[] num = new int[size];

        Console.WriteLine();

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

        {

            Console.Write("Input number {0}: ",i+1);

            num[i] = int.Parse(Console.ReadLine());

        }

        Console.WriteLine();

        Console.WriteLine("The first  element: {0}",num[0]);

        Console.WriteLine("The middle element: {0}",num[size/2]);

        Console.WriteLine("The last   element: {0}",num[num.Length-1]);

    }

}