**Here to Learn**

## Daniel Leskosky

It is important to always strive for the best time complexity when solving algorithm problems. I recently solved for the brute force solution to this problem and was ready to move on. Then, a fellow programmer on the world-wide-web reached out to me and encouraged me to do better! He showed me a solution that was much better than mine. The only problem was that I didn’t understand it at all. Well, now I do understand it. AND I want you to understand it too!

Read MoreEvery so often when I am practicing algorithm problems, I run into a problem that requires a bit of math to solve. For this “Path in ZigZag Labelled Binary Tree” problem, my initial impression was that I would have to do a breadth-first search on a tree. As I quickly found out, I was not dealing with a typical tree problem. This problem requires a bit of math to solve. I don’t know about you, but my math is a bit rusty.

Read MoreI was working on a LeetCode problem a few days ago. I was able to come up with a brute force solution, but wasn’t able to get any further past that. On the discussion board a user gave a solution that utilized histograms. The user also referenced another problem for more histogram practice. I don’t know about you, but I could use some more histogram practice. Let’s figure out how to solve “Largest Rectangle in Histogram”.

Read MoreI was going through LeetCode problems that I have solved, looking for one that would be good to write a post about. I came across the Dutch National Flag Problem and knew right away that it would be a good one. Let’s learn how to solve it!

Read MoreAlthough I continue my practice of algorithms, I am still having trouble identifying when to use the appropriate data structure. I recently attempted to solve a problem on LeetCode and completely missed the obvious hints that a queue would be a good data structure to use for the algorithm. This post will provide a detailed solution with illustrations for that problem. While the main purpose of this post is to help others get a clear mental picture of what is happening with the algorithm, I also write this post with the hope that I can work to strengthen my intuition of when to leverage the correct data structure.

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