using System;

public class Reverse

{

    public static void Main()

    {

        int n,y;

        Console.WriteLine("enter a numer");

        n=Convert.ToInt32(Console.ReadLine());

        y=rev(n);

        Console.WriteLine(y);

    }

    public static int rev(int k)

    {

    int r,sum=0;

        while(k!=0)

        {

            r=k%10;

            sum=sum*10+r;

            k=k/10;

        }

        return sum;

    }

}