I'm a student from China, and I've been competing in informatics for three years. But now I've hit some bottlenecks... Many of the questions I have done I forget the solution, even after doing a lot of a certain type of questions during the competition I also seemed to panic, I finished over a hundred or thousand problems, participated in a lot of Rounds, but the change of rating is not obvious... How do you train comprehensively while maintaining efficiency?