You must study things other than textbooks and syllabuses. The answers to math contest questions are very different from normal study. The content of the exam is extensive, which definitely exceeds the knowledge of high school. A lot of it is college content, but you have to master it. This is from the content, the method of solving problems and the requirements for thinking are higher and more ingenious than usual. Therefore, it is not enough to learn high school content well. You should study more by yourself, find extra-curricular books, or invite others to help you in the competition. If you want to win the second prize, come on.