using System;

public class Program

{

    public static void Main()

    {

        int [] arr=new int[5] {1,2,2,2,1};

        bool polindrom=true;

        for(int x=0;x<arr.Length/2;x++)

        {

            if(arr[x]!=arr[arr.Length-x-1])

            polindrom=false;

        }

        if(polindrom)

            Console.WriteLine("arry is polindrom");

            else

            Console.WriteLine("arry is not polindrom"); 

    }

}