using System;

public class Program

{

    public static void Main()

    {

        Console.Write("въведи число");

        int num = int.Parse(Console.ReadLine());

        int a = 0;

        while (num != 0)

        {

          a = a * 10 + num % 10;

          num = num / 10;

        }

        Console.WriteLine(a);

    }

}