First of all, there are many things to see in the competition, but don't review everything, otherwise you may not be able to do anything well. I don't know how tall you are now, I can only give you a rough idea. I don't care about the outline of the league. The syllabus is all for fun. Basically, half of them will not take the exam, such as convex hull. All you have to do is review functions, series, analytic geometry, plane geometry and inequalities. I'll read the rest when I have time. I especially remind you that the entrance examination is the college entrance examination, so don't drill too difficult questions. The most important thing is proficiency. Don't think you can forget by knowing the method. I suffered a big loss at that time. Be sure to answer the big questions skillfully for 5-8 minutes, otherwise you will only have to spell character.
Secondly, don't touch combinatorial mathematics unless you are strong. Generally speaking, there are two strategies, one try and two try. It's simple to try, but it takes more time; The second test was a bit difficult, but there were many points. Generally speaking, it is reasonable to get 80% right in one attempt and solve two problems in the second attempt.
By the way, it's best not to do new questions, look at the original questions, summarize the ideas and methods (very important), and do several sets of simulation questions regularly before the exam to find out the feeling, and don't care too much about the results.
Finally, don't take the game too seriously. Try to be peaceful in the examination room. Every year, there are examples of super masters making mistakes. Often after the exam, you will find that a pair of answers are actually very simple, but I was nervous and miscalculated. Not worth it. This is the real experience of my two leagues, but unfortunately I didn't enter the winter camp in the end.
I don't have a chance. I'm in college now. Learning to compete is very hard and tiring, but it is also very happy. I hope you can cherish it.