using System;

public class Program

{

    public static void Main()

    {

         int num,x,mone=0,y=0,avg=0;

        Console.WriteLine("please enter arry size:");

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

        int[] arr = new int[num];

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

        {

        Console.WriteLine("please enter next number:");

        arr[x]= int.Parse(Console.ReadLine());

            mone=arr[x]+mone;

            y++;

            avg=mone/y;

        }

        Console.WriteLine("the avg of all number is:{0}",avg);

    }

}