//Rextester.Program.Main is the entry point for your code. Don't change it.
//Microsoft (R) Visual C# Compiler version 2.9.0.63208 (958f2354)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;
using System.Text;

namespace Rextester
{
    public class Program
    {
        public static void Main(string[] args)
        {
            //Your code goes here
            DateTime now = DateTime.Now;
            string str1 = now.ToString("yyyyMMdd");
            now = DateTime.Now;
            string s1 = now.ToString("yyyy");
            now = DateTime.Now;
            string s2 = now.ToString("MMdd");
            string pass = "52422";
            string lastlogin = "";
            byte[] bytes1 = Encoding.ASCII.GetBytes(s1);
            byte[] bytes2 = Encoding.ASCII.GetBytes(s2);
            string str2 = ((int) bytes1[0] - 48 ^ (int) bytes2[0] - 48).ToString() + (object) ((int) bytes1[1] - 48 ^ (int) bytes2[1] - 48) + (object) ((int) bytes1[2] - 48 ^ (int) bytes2[2] - 48) + (object) ((int) bytes1[3] - 48 ^ (int) bytes2[3] - 48);
            string str3 = ((int) bytes1[3] - 48 | (int) bytes2[3] - 48).ToString() + (object) ((int) bytes1[2] - 48 | (int) bytes2[2] - 48) + (object) ((int) bytes1[1] - 48 | (int) bytes2[1] - 48) + (object) ((int) bytes1[0] - 48 | (int) bytes2[0] - 48);
            
            if (pass == str2)
            {
              Console.WriteLine("Chế độ 1");
            }
            else if ((lastlogin == "" || lastlogin != str1) && pass == str3)
            {
              Console.WriteLine("Chế độ 2");
            }   else     {
                Console.WriteLine("Mã bảo vệ không đúng hoặc tính năng bị vô hiệu");
            }
            Console.WriteLine(str1);
            Console.WriteLine(str2);
            Console.WriteLine(str3);
        }
    }
}