
|--树形DP
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oilover
NOIP2010三等,NOIP2011三等,2013年杭州赛区打铁,2014年广州赛区打铁,这么多年过去了,我还是这么垃圾!!!!!!!
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HDU 4123 Bob’s Race (树形DP + 单调队列)
参考原创 2014-11-17 21:35:48 · 1044 阅读 · 0 评论 -
Codeforces 486D. Valid Sets
486D - Valid Sets Firstly, we solve the case d = + ∞. In this case, we can forget all ai since they doesn't play a role anymore. Consider the tree is rooted at node 1. Let Fi be the number原创 2014-11-13 09:48:44 · 1480 阅读 · 0 评论