using System;

using System.Text.RegularExpressions;

using System.Globalization;

public class Program

{

    public static void Main()

    {

        var separator = CultureInfo.CurrentCulture.NumberFormat.NumberDecimalSeparator;

        //double d = Convert.ToDouble(Console.ReadLine());

        double d = Double.Parse(Regex.Replace(Console.ReadLine(),"[.,]",separator));

        Console.WriteLine(d);

    }

}