[popularonion]

That's because it is memorizing chess openings, or basically the same thing.

Most Leetcode Mediums fall into the category where the type of solution is obvious (sliding window/graph search/etc), and the code isn't hard to write, but there's a "trick" embedded in the problem and if you don't already know the trick, you're never going to figure it out in 30 minutes.

So the best strategy is to find a "Top N Leetcodes" list like Blind 75 and just memorize them. Of course you can't expect those exact questions to come up in every interview, but having a few dozen solutions already memorized should let you do some pattern recognition and lower your cognitive load while you're trying to figure out what that problem's trick is.

[pedrosorio]

> Most Leetcode Mediums (...) there's a "trick" embedded in the problem and if you don't already know the trick, you're never going to figure it out in 30 minutes

I am sorry to say, this is just not true.

> but having a few dozen solutions already memorized should let you do some pattern recognition

Chess opening memorization is pure "remember the moves, play the moves" that's it. No thinking or pattern recognition involved.

If this is about being able to solve problems by generalizing from having seen a few dozen solutions, then I don't think "memorizing" is the appropriate term here, at all.

[postalrat]

Do you have any evidence that isn't true? How often do truly new problems come up? Nearly every problem I see is after someone gets an an algorithm named after them.