Maybe not, can't free it here at codewars. So I only use it as a reminder to free everything I have allocated. Never use this style in my own projects. But then again, I'm truly no C guru.

Hello, and welcome!
It's a function to free the memory allocated to the pointer final by malloc : )

Hello Mate!
I had a problem, I solved it without regular expressions. But it still needed me to import re.
Not that big of a deal but just so you know :)