using System;
using System.Collections.Generic;
using System.Globalization;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Problem5_ReverseNumber
{
    class ReverseNumber
    {
        static void Main()
        {
            double inputNum = double.Parse(Console.ReadLine());
            double total = ReverseFloatingPoint(inputNum);
            Console.WriteLine(total);
        }
        static double ReverseFloatingPoint(double number)
        {
            string numberAsString = number.ToString();
            List<string> result = new List<string>();
            for (int i = numberAsString.Length - 1; i >= 0 ; i--)
            {
                result.Add(numberAsString[i].ToString());
            }
            string f = string.Join("",result);
            double s = double.Parse(f, CultureInfo.InvariantCulture);
            return s;
        }
    }
}