2017年3月21日
树链剖分-SPOJ375(QTREE)
摘要： QTREE - Query on a tree You are given a tree (an acyclic undirected connected graph) with N nodes, and edges numbered 1, 2, 3...N-1. We will ask you t 阅读全文
posted @ 2017-03-21 13:40 羊毛羊 阅读(282) 评论(0) 推荐(0) 编辑