using System;

public class Program

{

    public static void Main()

    {

        int[] a= new int[]{18,3,7,5,35,9,11};

        Console.WriteLine(avg(a));

        arg=avg(a);

        Console.WriteLine(ismid(a,arg));

    }

    public static double avg(int[] arr)

    {

        double c=0,d=0;

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

        {

           c+=arr[i];

            d=c/arr.Length;

        }

        return d;

}

    public static bool ismid(int[] arr, arg)

    {

    }

}