I have always just posted the code of the topic, and I have not seriously summarized or written some thoughts. I plan to write some today.
Recently, I have been playing the Software Cup again (the front end has not made a name for it for a long time), and then I have less brushed questions. I am going to play the Xiangtan Invitational Tournament this week, so I started to return to ACM.
Graph theory has never been studied seriously and systematically (but graph theory is really important), and now I'm starting to learn it.