There are first, second and third prizes in the semi-finals, which are determined by the ranking of summer camp exams.
The winning percentage is not bad. But this award has nothing to do with the final, so no one cares about this award.
Every year, the finals are different. Some people are cut according to the number of people in the rematch, but as long as you don't do too badly in the exam, there are usually. If your teacher is famous, of course, it is better, and maybe you can pass directly. Our school has already had the preliminaries, but we can still enter the finals and win the first prize. So in my opinion, the rematch is a stunt. Mainly used for lectures, the math Committee used to collect money.
However, in recent years, due to more people participating in the competition, many schools will distribute training and many good teachers will also distribute training, so the quality of lectures in summer camps is getting worse and worse. If you have a good foundation, I suggest you don't go. Just tell the teacher that you only need to take the second interview, and the teacher will generally agree. Personally, I think it's a waste of money.
Never heard of official website. Ask the teacher.
Finally, the summer camp exam topic is not difficult. It is almost enough to get a prize, and it is easier to get a prize.