using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine(ReverseInt(123));

    }

    public static int ReverseInt(int number) 

    {

        int reversedNumber = 0;

        while(number > 0)

        {

            reversedNumber = reversedNumber * 10 + (number % 10);

            number /= 10;

        }

        return reversedNumber;

    }

}