namespace HTTPProtocol_exercises___Validate_URL
{
    using System;
    using System.Net;
    using System.Text.RegularExpressions;

    class Program
    {
        static void Main()
        {
            string input = WebUtility.UrlDecode(Console.ReadLine());
            Regex regexCheck = new Regex(@"(https?):\/{2}([a-zA-Z0-9\.-]+)(\:\d+)?([\/][\w\W]+)");
            Match match = regexCheck.Match(input);
            string protocol = match.Groups[1].Value;
            int defaultPort = protocol == "http" ? 80 : 443;
            string host = match.Groups[2].Value;
            string port = match.Groups[3].Value ?? defaultPort;
            string path = match.Groups[4].Value;
            string queryStrings = match.Groups[5].Value;
            string fragment = match.Groups[6].Value;

            if (string.IsNullOrEmpty(protocol))
            {
                Console.WriteLine("Invalid URL");
                return;
            }

            if (string.IsNullOrEmpty(host))
            {
                Console.WriteLine("Invalid URL");
                return;
            }

            if (string.IsNullOrEmpty(path))
            {
                Console.WriteLine("Invalid URL");
                return;
            }

            Console.WriteLine("Protocol: {0} \nHost: {1} \nPort: {2} \nPath: {3}", protocol, host, port, path);

        }
    }
}