2017年2月17日
SPOJ COT2 - Count on a tree II（LCA+离散化+树上莫队）
摘要： COT2 - Count on a tree II #tree #tree You are given a tree with N nodes. The tree nodes are numbered from 1 to N. Each node has an integer weight. We 阅读全文
posted @ 2017-02-17 21:22 Blackops 阅读(404) 评论(0) 推荐(0) 编辑