LogFAQs > #961240766

Day 24

Changing it up to one leetcode per day, and more time spent on system design.

First question was the one from yesterday. https://leetcode.com/problems/number-of-boomerangs/. I figured it out, but my answer is slow according to the running times. Still, it's O(n^2) and it makes sense to me. Most likely I'd be going with my method since it logically follows to go in that direction. I'll stick with what I have.

Learned the high level about designing a chat system, like what you see with facebook or whatsapp. A lot of the topics I already covered before, but I've added new information now. Now it's all about reviewing the concepts.