Bit Exchange

using System;

class BitsExchange
{
    static void Main()
    {
        long num = long.Parse(Console.ReadLine());
        long firstThreeBits = (long)(num >> 3) & 7;
        long secondThreeBits = (long)(num >> 21) & 7;
        //first variant
        num -= (firstThreeBits << 3);
        num += (secondThreeBits << 3);
        num -= (secondThreeBits << 24);
        num += (firstThreeBits << 24);

        //second variant
        /*long difference = Math.Abs(firstThreeBits - secondThreeBits);
        if (firstThreeBits > secondThreeBits)
        {
            num -= (difference << 3);
            num += (difference << 24);
        }
        else
        {
            num += (difference << 3);
            num -= (difference << 24);
        }*/

        Console.WriteLine(num);
    }
}