Wondering if it has something to do with the number being at the start of the word, but that doesn't quite make sense

But that's exactly it ;-) %[] only matches a non-empty sequence of characters. As soon as the match fails, sscanf() returns, without parsing the integer.

You wrong, because string VOWELS is of constant length (5) and does not depend on an input. So it will be O(n*const) = O(n).

jeff

i'm deceased

This code doesn't follow typical styling, which would have the line broken into a couple new lines and helps dramatically with readability. I think some believe one-liners look cooler.

Me every time I hit "submit"

I am very impressed you managed this in one line! /s

I'm so jealous, I tried coming up with a formula for way too long. I'm kicking myself seeing how "simple" it was.

me too ;)

They locked me in a room

This one has kicked my butt in C. I don't know if I'm just overthinking it or what, but I've gotta come back another time