using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Naomi Bernabe, 2C inf");

        double C1,C2,C3,P;

        Console.WriteLine("Ingese calificacion 1: ");

        C1=double.Parse(Console.ReadLine());

        Console.WriteLine("Ingese calificacion 2: ");

        C2=double.Parse(Console.ReadLine());

        Console.WriteLine("Ingese calificacion 3: ");

        C3=double.Parse(Console.ReadLine());

        P=(C1+C2+C3)/3;

        Console.WriteLine("El promedio final es: "+P);

    }

}