02. Registration

using System.Text.RegularExpressions;

namespace _02.Registration;

internal class Program
{
    static void Main(string[] args)
    {
        string pattern = @"^[U][$](?<username>[A-Z][a-z]{2,})[U][$].*?[P][@][$](?<password>[A-Za-z]{5,}[A-Za-z0-9]*?\d)[P][@][$]$";

        short inputCount = short.Parse(Console.ReadLine());

        int validRegexCount = 0;

        for (int i = 0; i < inputCount; i++)
        {
            string regexInput = Console.ReadLine();

            Match match = Regex.Match(regexInput, pattern);

            if (match.Success)
            {
                Console.WriteLine($"Registration was successful");

                Console.WriteLine($"Username: {match.Groups["username"].Value}, Password: {match.Groups["password"].Value}");

                validRegexCount++;

                continue;
            }

            Console.WriteLine($"Invalid username or password");
        }

        Console.Write($"Successful registrations: {validRegexCount}");
    }
}