Earlier quoted context omitted.
I dunno where everyone got the idea that Leetcode is required for this stuff. You learn everything you need to pass these interviews in a 101 or 102 level algorithms/data structures class.
This is weird because I work at FAANG and one of the things that everyone acknowledges is that we all studied to get past the damn interview loop. Yes it is covered in classes, there is nothing new but at the very least you need to brush up.
There was a joke that you just had to say "hash tables" 3x fast and you'd just get an offer. So many interview questions get torn apart by a good hash application.