I mean, just because you implemented something in a low level lang, it doesn't mean you're gonna have the fastest implementation. Even in high level langs, there's usually heavy optimization involved in things that are done all the time (e.g. web servers)
A vibe programmer that built a palm-sized fusion reactor in a cave over the course of 3 months with a single companion? Perfectly respectable to me. And he probably made his own AI too :)
I've always imagined peak programming as building up from low level languages, putting on some layers of abstraction and automatization written by yourself, and end up writing some trivial commands to produce very interesting outputs... Who knows? Maybe throwing around some holograms and voice-commands asking for nonsense. It doesn't get much more vibey than that.
Programming in vim and emacs does look like that lol.
Factorial is one of the solutions of the recurrence relationship f(x+1) = x * f(x). If one states that f(1) = 1, then it only follows from the recurrence that f(0) = 1 too, and in fact f(x) is undefined for negative integers, as it is with any function that has the property.
It would be more of an exception to say f(0) != 1, since it explicitly denies the rule, and instead would need some special case so that its defined in 0.
You should bookmark theindex.moe (aka piracy.moe), it has a comprehensive list of manga/anime streaming sites, you can use search criteria like langauges, soft-subs, noads, no anti-adblock, etc.
I just imagined the set of countable ordinals, and there's a universe where I'm right