How I Tackled Over 600 LeetCode Problems, and Here Are My Recommendations. I want to tell you a story about how I started from the level of "can't solve even 1 easy problem out of 10" to the level of ...

Getting good at LeetCode Java can feel like a puzzle sometimes, right? You see all these problems, and you’re not sure where to even start. This guide is here to break down the common approaches and ...

Recently, I have been taking some sessions on the road to mastering Data Structures and Algorithms and Competitive Programming. Leetcode contests are perfect for those who want a grip on their DSA ...

So, you’re looking to get better at those tricky LeetCode problems, especially the ones with stacks and queues? Good call! These data structures pop up all the time in coding interviews. It can feel a ...

* Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level).

This book is notes about learning data structure and algorithm. It was written in Simplified Chinese but other languages such as English and Traditional Chinese are also working in progress.