Are challenges for real?

Question

How t.f. can somebody take the correct answer on 30 seconds for a complicated problem which requires almost all the 30 sec to be read?

Answer 1

You are right Gordie, I think many people memorise the answer, and that there are "professional" challengers that consider challenging is more important than learning to code.

Answer 2

there are also a limited number of quiz questions. people memorize them