I don't know what leetcode is trying to prove they started giving design questions now for 3-4 consecutive days , earlier 1 week only bst questions then 1 week only stack based questions.
Please use a random func() and give questions like it used to be earlier where we were in touch of every topic.
It's request to kindly roll back to previous format.

(PS: If someone wants to practice bst questions for 7 days they can do by simply clicking on tag option.)