using System;

using System.Linq;

public class Program

{

    private static byte[] answer = new byte[]

        {

            97,

            220,

            72,

            79,

            44,

            136,

            244,

            147,

            147,

            63,

            90,

            103,

            3,

            228,

            2,

            111,

            243,

            182,

            81,

            72,

            115,

            63,

            250,

            60,

            146,

            231

        };

    private static bool checkFlag(string flag)

    {

        uint num = 12345u;

        byte[] array = new byte[flag.Length];

        for (int i = 0; i < flag.Length; i++)

        {

            Console.WriteLine(num);

            array[i] = (byte)((uint)flag[i] ^ num);

            num *= (uint)array[i];

            num = (num >> 3 | num << 29);

        }

        return Program.answer.SequenceEqual(array);

    }

    private static string reverseFlag()

    {

        uint num = 0;

        byte[] array = answer;

        for (int i = 0; i < answer.Length; i++)

        {

            array[i] = (byte)((uint)answer[i] ^ num);

            num /= (uint)array[i];

            num = (num << 3 | num >> 29);

        }

        string words = System.Text.Encoding.Default.GetString(array);

        return "Answer: "+words;

        //return Program.answer.SequenceEqual(array);

    }

    public static void Main()

    {

        checkFlag("asdfasdfasdf");

        Console.WriteLine(reverseFlag());

    }

}