Copying my code is not recommended, you're risking a -42.
Except from that, all the code was done in one month, 15h per days. 19 is focused on learning by yourself, and copying the works of other is just the opposite from their goal. If you can't do an exercises, don't do it.
Good luck ! Have a nice piscine, be the force be with you !
Written by Martichou. Thanks s19 for the experience !