2012年4月13日
HGC 1356 Prime Node【树形DP+线性素数打表】
摘要： DescriptionSuppose there is a tree named A. All nodes of A have a weight v(0<v<4000000).Now, we will give the definition of "Prime Node".A node is a Prime Node if the following conditions are satisfied.The subtree of A whose root node is b will be marked as B. If all nodes in B have 阅读全文
posted @ 2012-04-13 00:06 'wind 阅读(341) 评论(0) 推荐(0)