For many people that are preparing for coding interviews, the fear of dynamic programming (DP) questions is quite common. This is in part due to the type of problems that often requires DP to solve. These questions often concern combinatorics and repetitive calculations.

Now, if someone was learning about DP…


Much of the algorithms we’ll be discussing in this series will require us to efficiently pull the lowest values in a set of unsorted numbers without looking at every number in the list.

While sorting or traversing a list may appear to be efficient, it gets rather expensive when we…


One of the difficulties in dealing with directed acyclic graphs (DAGs) is that they can look complicated and messy. This makes it difficult to see the relationships that vertices have with each other.

In this post, we’re going to discuss and learn how to rearrange the vertices of DAGs in…


By now, we have an understanding of what a graph is and learned some of the methods in traversing them.

While, we’ve already seen directed graphs, it’s time to get a formal understanding of them and uncover exciting properties that come along with their nature.

In this post, we’ll be…


One thing that we’ll be doing a lot with the algorithms in this series is graph traversal. What does this mean exactly?

Basically, the idea is that we’ll be moving around the graph from one vertex to another and discovering the properties of their interconnected relationships.

Two of the most…


To simply put it, a graph is a collection of vertices and a collection of edges such that each edge connects a pair of vertices together. A visual representation would be:

the nodes (vertices) are connected by the lines (edges)

However, graphs can come with various properties and varying sizes. Here are a few examples:


Since as far back as I could remember, I’ve always wanted to learn Chinese Mandarin. As a kid speaking the Teochew dialect, I always felt left out whenever my dad watched Chinese dramas and I couldn’t understand a single word. It was difficult just getting started in learning as a…

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