A few years back I worked through both AlgoExpert and NeetCode while preparing for interviews. The 100 polished videos and the 400+ free walkthroughs were useful for what they covered. The interview round that broke me wasn't a problem either platform had skipped. It was a problem they both had a clean walkthrough for, where I could read either solution after the round and recognise the technique, but in 25 minutes against a whiteboard I couldn't see it. The problem was Longest Palindromic Substring. Both platforms have a video. Both derive expand around centre cleanly. After watching either, the technique makes sense. The issue was the interviewer didn't say "this is a palindrome expansion problem." The prompt said "find the longest substring that reads the same forwards and backwards." That gap, between the technique I could follow on a video and the technique I could spot from a description, is what neither platform set out to train. TL;DR: AlgoExpert wins on video depth per problem.…