摘要：
题目链接 http://acm.hust.edu.cn/vjudge/contest/view.action?cid=28619#overview密码 acmore还是感觉不怎么会线段树，还是得给自己另外多找点题目练练Problem A HDU 3874Necklace 树状数组+离线操作见http://www.cnblogs.com/gj-Acit/p/3249827.htmlProblem B HDU 2227Find the nondecreasing subsequences 见http://www.cnblogs.com/gj-Acit/p/3258508.htmlProblem . 阅读全文