Take a stroll through LeetCode and you'll see that the hard part isn't memorizing all the "good approaches", it's understanding when to apply each and also whet

Take a stroll through LeetCode and you'll see that the hard part isn't memorizing all the "good approaches", it's understanding when to apply each and also whether you need to pull out parts of the algo or apply multiple. Many of the questions don't have obvious solutions unless you've answered similar questions multiple times (or you have good recall and recall a pattern after seeing it just once), or you're able to tease out the "real problem" from the obfuscating English.