Login

using System;
using System.Globalization;
using System.Linq;

class LogIn
{
    static void Main()
    {

        string userName = Console.ReadLine();
        char [] userArray = userName.ToCharArray();
        var count = 1;
        for (int i = 0; i<userArray.Length/2; i++)
        {
            char a = userArray[i];
            char b = userArray[userArray.Length - i - 1];
            userArray[i] = b;
            userArray[userArray.Length - i - 1] = a;
        }

       string password = Console.ReadLine();
        char[] passwordArray = password.ToCharArray();

            while (!passwordArray.SequenceEqual( userArray) && count <= 3)
            {
                Console.WriteLine("Incorrect password. Try again.");
                count++;
                password = Console.ReadLine();
                passwordArray = password.ToCharArray();
            }
             if (!passwordArray.SequenceEqual(userArray) && count==4)
             {
               Console.WriteLine($"User {userName} blocked!");
             }

        if (passwordArray.SequenceEqual(userArray))
        {
            Console.WriteLine($"User {userName} logged in.");
        }

    }
}