public class AccountChecker
{
  public static void main(String[] args)
  {
    if (args.length < 2)
    {
      System.out.println("3");
      return;
    }
    String username = args[0];
    String password = args[1];

    CheckAccount checkAccount = new CheckAccount(username, password);
    checkAccount.validate();
  }
}


public class CheckAccount
{
  static final String USER_AGENT = "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36";
  String foundtoken = "";
  private String username;
  private String password;

  CheckAccount(String user, String pass)
  {
    this.username = user;
    this.password = pass;
  }

  public void validate()
  {
    try
    {
      String url = "https://account.mojang.com/login";

      URL obj = new URL(url);

      HttpsURLConnection con = (HttpsURLConnection)obj.openConnection();


      CookieHandler.setDefault(new CookieManager());


      BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));

      String token = new String();
      Pattern MY_PATTERN = Pattern.compile("name=\"authenticityToken\" value=\"([a-f0-9]+)\"");
      String inputLine;
      while ((inputLine = in.readLine()) != null)
      {
        Matcher m = MY_PATTERN.matcher(inputLine);
        if (m.find()) {
          token = m.group(1);
        }
      }
      List<String> cookies = new ArrayList();
      cookies = (List)con.getHeaderFields().get("Set-Cookie");
      in.close();



      con.disconnect();
      obj = new URL(url);
      con = (HttpsURLConnection)obj.openConnection();






      con.setRequestMethod("POST");
      con.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/55.0.2883.87 Safari/537.36");
      con.setRequestProperty("Accept-Language", "en-US,en;q=0.5");

      String urlParameters = "authenticityToken=" + token + "&username=" + this.username + "&password=" + this.password;


      con.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");

      con.setRequestProperty("Content-Length", Integer.toString(urlParameters.length()));

      con.setDoOutput(true);
      DataOutputStream wr = new DataOutputStream(con.getOutputStream());
      wr.writeBytes(urlParameters);
      wr.flush();

      wr.close();
      con.connect();


      Pattern MY_PATTERN2 = Pattern.compile("href=\"/me/renameProfile/([a-f0-9]+)\">Change</a>");

      in = new BufferedReader(new InputStreamReader(con.getInputStream()));

      StringBuffer response = new StringBuffer();
      while ((inputLine = in.readLine()) != null)
      {
        response.append(inputLine);

        Matcher m = MY_PATTERN2.matcher(inputLine);
        if (m.find())
        {
          token = m.group(1);

          this.foundtoken = token;
        }
      }
      in.close();
      if (response.toString().contains("To confirm your identity, please answer the questions below."))
      {
        System.out.println("1");
        return;
      }
      if (this.foundtoken != "") {
        System.out.println("2");
      } else {
        System.out.println("0");
      }
    }
    catch (IOException e)
    {
      System.out.println("3");
    }
  }
}