using System;

public class Program

{

    public static void Main()

    {

        int i;

        float n,total=0;

        Console.WriteLine("Input Number");

        Console.WriteLine("====================");

        for(i=1;i<=3;i++){

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

            total += n;

        }

        Console.WriteLine("====================");

        Console.WriteLine("Average Number : {0}",total/3);

    }

}