using System; using System.Globalization;

namespace ProgramaChsapDotNetCore { public class Program { static void Main(string[] args)

    {
        double n1, n2, p1, p2, media;
        p1 = 3.5;
        p2 = 7.5;

        n1 = double.Parse(Console.ReadLine(), CultureInfo.InvariantCulture);
        n2 = double.Parse(Console.ReadLine(), CultureInfo.InvariantCulture);

        media = (n1 * p1 + n2 * p2) / 11;

        Console.WriteLine("NOTA FINAL = " + media.ToString("F5", CultureInfo.InvariantCulture));

        Console.ReadLine();
    }

}

}