missed this one so played virtual, B was def c level pnc que, C tho was rather interesting i figured how the solution is <n for any case but the MOD line kept me hooked for another 10 minutes until this was accepted. thought D is some weird dp , couldnt figure out. GG
Solving problems of the same level just increases your count and nothing else If you're good at Leetcode, try solving more hard problems or attempt real OA problems I wish I had realized it earlier
after looking at binary lifting questions so many as 4th and not being able to solve, today is the day to finally actually code and answer lca in log n .