2020-11-29

Summary of
the Ladder Tournament This time the Ladder Tournament did nothing, which is expected. L1 didn't finish in an hour, and there was still one question that was not completed. It was really too good. L2-1 is essentially a simple simulation, but the "stack" is mentioned in the question stem. Seeing the "stack", I immediately jumped to L2-2. L2-2 is a simulated question, which is troublesome but lacks the amount of thinking, and requires deadlocking words. I read the question slowly and cannot extract the key information quickly. It took 30 minutes before and after. It only took 7 minutes to submit and another 10 minutes. I looked for a bug, but I didn't find it, so I got 7 points. L2-3 is a binary tree problem. I didn’t read it because I didn’t learn it well. In the last 10 minutes or so, I looked back at the obscure question left by L1, and still didn't understand it after more than 10 minutes.
The next time is to learn the data structure, especially the stack and binary tree, sorting principle, search algorithm, do more questions, and practice hand speed in limited time games.