2018年12月14日
Count on a tree SPOJ - COT （主席树，LCA）
摘要： You are given a tree with N nodes. The tree nodes are numbered from 1 to N. Each node has an integer weight. We will ask you to perform the following 阅读全文
posted @ 2018-12-14 19:00 Jiaaaaaaaqi 阅读(282) 评论(0) 推荐(0)