数据结构和算法讲解，里面有NOIP，ACM竞赛的老师PPT和某个专业方面的深层次了解。里面的有些算法研究的相当深入，值得深入学习。-Explain data structures and algorithms, which has NOIP, ACM contest PPT and a professional teacher' s deep understanding. There' s some pretty in-depth study of algorithms, it is