Leetcode Pattern 2 | Sliding Windows for Strings

A fellow redditor from /r/cscareerquestions pointed me to this awesome thread on leetcode discuss which reveals the sliding window pattern for solving multiple string (substring) problems. Today we’ll explore the intuition behind this powerful…

Leetcode Pattern 1 | BFS + DFS == 25% of the problems — part 1

It is amazing how many graph, tree and string problems simply boil down to a DFS (Depth-first search) / BFS (Breadth-first search). Today we are going to explore this basic pattern in a novel way and apply the intuition…

Leetcode Pattern 3 | Backtracking

A very important tool to have in our arsenal is backtracking, it is all about knowing when to stop and step back to explore other possible solutions. In today’s post we’ll explore the common pattern in solving backtracking problems and set up the stage to dive into…

Leetcode Pattern 0 | Iterative traversals on Trees

The key to solve algorithm problems posed in technical interviews or elsewhere is to quickly identify the underlying patterns. This is my attempt to decompose leetcode problems and group them into minimal sets. I figured out this would be a…

Leetcode Pattern 1 | DFS + BFS == 25% of the problems — part 2

Hola again ! Thanks for all the positive feedback. It really motivates me to keep writing daily. Many people actually asked me to write on DP patterns next as that is the most dreaded topic in interview prep. I would…

Leetcode Pattern 4 | Meta Stuff

So this article is a bit different from the other ones in this series and it’s not about specific algorithms but the general approach one should try to follow in their leetcode journey. This is based on my own personal experiences and what I have gathered talking to people…

Leetcode Patterns : Checkpoint 0

Hi there! It’s been so long since my last post and my life has undergone so many changes during these past few months :), it’s insane! The one constant that remains is people reading these blogs and reaching out to me on LinkedIn to provide feedback, it makes my day!