using System;

public class KvadratlarCemi

{

    public static void Main()

    {

        int n;

        double a, s = 0;

        string c = "";

        Console.WriteLine("n-i daxil edin: ");

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

        for( int i = 1; i <= n; i++)

        {

            a = double.Parse(Console.ReadLine());

            s = s + a;

            if (i == 1)

                c = c + "(";

            if (i < n)

               c = c + Convert.ToString(a) + " + ";

            else

               c = c + Convert.ToString(a) + ")";

        }

        Console.Write(c + " / {0} = {1}", n, s/n);

    }

}

​

​