说明：  ACM算法竞赛入门经典（第二版），作者为刘汝佳，本书可作为全国青少年信息学奥林匹克联赛（NOIP）复赛教材、全国青少年信息学奥林匹克竞赛（NOI）和ACM国际大学生程序设计竞赛（ACM/ICPC）的训练资料，也可作为IT工程师与科研人员的参考用书
(The ACM algorithm competition is an introduction classic (Second Edition), written by Liu Rujia. This book can be used as the training materials for the National Youth informatics Olympic League (noip), the National Youth informatics Olympic competition (NOI) and ACM International College Students' Programming Competition (acm/icpc), and also as a reference book for it engineers and researchers)