using System;

public class Program

{

    public static void Main()

    {

        int x,y;

        double avg=0.0,sum=0.0;

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

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

        {

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

            sum+=y;

        }

        avg=sum/x;

        Console.WriteLine("Avg= "+avg);

    }

}