According to the Coding Competitions site, Google Code Jam is being discontinued, as well as Kick Start. Here is a link for more information. This year, they instead plan to hold four "farewell rounds" with no prizes on April 15th. According to the FAQ, rounds A, B, C, D will be in increasing order of difficulty with Round A being for beginners and Round D having difficulty between Round 3 and the Finals. Additionally, sign-in will be disabled on June 1st and the site will be shut down on July 1st.

In one of Gennady Korotkevich's videos (https://youtu.be/JU3HY5GLVnY?t=1214), I notice that when he clicks the "Choose a File" button to submit his code, the exact file he needs to submit is already selected. How does he do this?

https://youtu.be/0662cPF08XI

I have created a video introducing graph theory. This is for those who are unfamiliar with graphs, and it covers the fundamentals. Graph theory is the study of graphs, which is a set of nodes connected together by edges. These nodes and edges can be used in real life to represent connections. Some examples are the connections between cities and highways, friendships between people, and family trees. Graphs can be extremely useful for simplifying complex structures, and it is the study that makes applications like Google Maps possible.

I talk about:

• What are graphs, vertices, edges

• Graphs that are drawn differently but are the same

• Some terminology (paths, directed and undirected edges)

• Examples of scenarios that can be represented as graphs

• Types of problems that graph theory can solve

And just for fun, here is a drawing that I made for this video:

Feedback would be appreciated.