Login

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Login
{
    class Program
    {
        static void Main(string[] args)
        {
            string username = Console.ReadLine();
            string password = Console.ReadLine();

            string reversedUsername = string.Empty;
            char[] usernameCharArray = username.ToArray();

            for (int i = usernameCharArray.Length - 1; i >= 0; i--)
            {
                reversedUsername += usernameCharArray[i];
            }

            while (password != reversedUsername)
            {
                Console.WriteLine($"Incorrect password. Try again.");
                password = Console.ReadLine();
            }

            Console.WriteLine($"User {username} logged in.");

        }
    }
}