Algorithm · Pinduoduo · Hard
Problem: Build a Simplified Twitter Feed Create a basic Twitter-like service with support for publishing tweets, managing follow relationships, and reading a user's news feed. Give each tweet a timestamp that increases with every post operation, so a tweet created later always has a greater timestamp. The system must handle these operations: post userId tweetId: Have userId publish the tweet identified by tweetId. follow followerId followeeId: Make followerId follow…