using System;

​

public class Program

{

    public static void Main()

    {

        double x = Convert.ToDouble(Console.ReadLine());

        double y = Convert.ToDouble(Console.ReadLine());

        double z = Convert.ToDouble(Console.ReadLine());

        double M = (x+y+z)/3;

        Console.WriteLine("moadel");

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

    }

}