I'm sure it's been mentioned before, but I'd love to have some more feedback on my code. I'm on the website to improve my coding skills, I want to know why my code got 80% even though 100% of the test cases back. I'm completely new to the golfing challenges, so I have no idea what is done to get the code so short by other people. Maybe some tutorials or a cheat sheet type of thing?
To stop advantages in certain languages for some programs, I think having users fill in what programming languages they can do would be good. In CoC, if all users have a common programming language, the challenge will be in that programming language. Otherwise, it'll be any of them as normal. Probably wouldn't result in many specific language questions, but hey.
Also, a possible idea for the stopping of the copy/paste. If someone completes a challenge in a certain language, they cannot use the same language if they get the same challenge. Will probably have some problems with people not being able to program in any of the languages left, or actually running out of languages, but a system like that. In any case, the copy/pasting needs to stop.