Welcome to Project-GC Q&A. Ask questions and get answers from other Project-GC users.
If you get a good answer, click the checkbox on the left to select it as the best answer.
Upvote answers or questions that have helped you.
If you don't get clear answers, edit your question to make it clearer.
Ok, I've did it
the checkers are here:
<a href="http://project-gc.com/Challenges/GC4PXMM/15953">Project-GC Challenge checker</a>
<a href="http://project-gc.com/Challenges/GC4PXMN/15952">Project-GC Challenge checker</a>