I believe there must be some tab that shows solutions, even posted by others. Shows runtime, time complexities, space complexities and so on as it happens on leetcode. No matter how much we try, some solutions are very hard to get. Wasting more than an hour in a problem seems unjust. Also the question will be stuck in mind for several years. Yeah solutions can be limited to contestants. A true programmer will never cheat, those who cheat will never progress.