Is it useful for teacher Xiaohei to brush lessons?

It is useful for teacher Xiaohei to brush lessons. According to the relevant public information, Mr. Xiaohe's brushing class is usually equipped with a large number of exercise questions, and there are different choices for different difficulties, which provides more practice opportunities and challenges. It can help students to study algorithms and data structures in a planned and systematic way, cultivate their programming ability and the ability to solve practical problems, and enhance their competitiveness. Teacher Xiaohe is an interviewer and algorithm lecturer of a well-known Internet company, mainly engaged in algorithm training and interview counseling. He is good at explaining algorithms and data structures in simple terms, so that students can better understand and apply them to practical problems.