using System;

public class Program

{

    public static void Main()

    {

        double n1,n2,n3,n4,n5,average;

        Console.Write("input n1 :");

        n1 = Convert.ToDouble(Console.ReadLine());

        Console.Write("input n2 :");

        n2 = Convert.ToDouble(Console.ReadLine());

        Console.Write("input n3 :");

        n3 = Convert.ToDouble(Console.ReadLine());

        Console.Write("input n4 :");

        n4 = Convert.ToDouble(Console.ReadLine());

        Console.Write("input n5 :");

        n5 = Convert.ToDouble(Console.ReadLine());

        average=(n1+n2+n3+n4+n5)/5;

        Console.WriteLine("Average = {0}",average);

    }

}