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11991 - Easy Problem from Rujia Liu? Though Rujia Liu usually sets hard problems for contests (for example, regional contests likeXi’an 2006, Beiji... 阅读全文
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11995 - I Can Guess the Data Structure! There is a bag-like data structure, supporting two operations:1 x Throw an element x into the bag.2 Take out ... 阅读全文
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线段树转载请注明出处,谢谢!http://blog.csdn.net/metalseed/article/details/8039326持续更新中···一:线段树基本概念1:概述线段树,类似区间树,是一个完全二叉树,它在各个节点保存一条线段(数组中的一段子数组),主要用于高效解决连续区间的动态查询问... 阅读全文