This was a JS and Python kata long before it was a C kata. Kata can have only one difficulty; there can be no different ranking per language.

Maybe the translation should not have been approved, maybe C programmers should accept their language is different, and tasks are more difficult than in other languages.

That's all water under the bridge though; in C, this is now a not that easy kata that gives very few points. You can always skip it, or solve it in another language. ( Or try to convince Codewars to massively redesign their site and introduce ratings per language .. nah, probably not that. )

rejecting as deprecated by this one

8kuy as difficulty for C-Language is too optimistic (in my view) ;-)
It's not the easiest assignment for C as programming language.

C is not Python (with a solution as an one-liner python code). It's not just calling a function from a standard library. Under C is this a real challenge (but a nice one).

C Language

Problem With Test Cases:

I had an invalid array entry (empty string) and the exptected base was 299