My Retake Final Exam 11/04/2022 Problem 2

using System;
using System.Text.RegularExpressions;

namespace ConsoleApp10
{
    class Program
    {
        static void Main(string[] args)
        {
            string regexPattern = @"(U\$)([A-Z][a-z]{2,})\1(P@\S)([A-z]{5,}[\d]+)\3";
            int lines = int.Parse(Console.ReadLine());
            int successfulRegistrationsCount = 0;

            for (int i = 0; i < lines; i++)
            {
                string text = Console.ReadLine();

                if (Regex.IsMatch(text, regexPattern))
                {
                    successfulRegistrationsCount++;
                    var match = Regex.Match(text, regexPattern);
                    var splitted = match.ToString()
                    .Split(new string[] { "U$", "P@$" }, StringSplitOptions.RemoveEmptyEntries);
                    Console.WriteLine($"Registration was successful");
                    Console.WriteLine($"Username: {splitted[0]}, Password: {splitted[1]}");

                }
                else
                {
                    Console.WriteLine("Invalid username or password");
                }
            }
            Console.WriteLine($"Successful registrations: {successfulRegistrationsCount}");
        }
    }
}