using System;

public class Program

{

    public static void Main()

    {

        double N1 =0;

        double N2 =0 ;

        double N3 =0;

        double N4 =0;

        double promedio =0;

        double minimo =0;

        Console.WriteLine("DIGITE NOTA 1");

        N1=double.Parse(Console.ReadLine());

        Console.WriteLine("DIGITE NOTA 2");

        N2=double.Parse(Console.ReadLine());

        Console.WriteLine("DIGITE NOTA 3");

        N3= double.Parse(Console.ReadLine());

        Console.WriteLine("DIGITE NOTA 4");

        N4=double.Parse(Console.ReadLine());

        minimo= N1;

        if(N2<N1)

        {

            minimo = N2;

        }

        if(N3<N2)

        { 

            minimo= N3;

        }

        if(N4<N3)

        {

            minimo = N4;

        }

            promedio=(N1+N2+N3+N4-minimo)/3;

            Console.WriteLine("La nota final es " + promedio);

    }

}