using System;                   

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Tito Polo, 2do A inf");

        double C1,C2,C3,P;

        Console.WriteLine("Ingrese calificaciòn 1:");

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

        Console.WriteLine("Ingrese calificaciòn 2:");

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

        Console.WriteLine("Ingrese calificaciòn 3:");

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

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

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

    }

}