摘要： One day Polycarp decided to rewatch his absolute favourite episode of well-known TV series "Tufurama". He was pretty surprised when he got results onl 阅读全文

摘要： 推荐博客 ： https://blog.csdn.net/creatorx/article/details/75446472 ： https://www.cnblogs.com/zyf0163/p/4749042.html 早在很久之前就听过主席树这个名词，不过一直没有去学，当时想的是先把线段树学明 阅读全文