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【数据结构】【线段树及常见标记的维护】

2013-05-22 12:40:40| 分类：数据结构 | 标签： |举报 |字号大中小订阅

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随时把自己的想法可以通过手机打下来，所以先留存目，以便良心发现来更新旧资料。

首先是关于线段树的区间问题，对于每一个闭区间[a，b]，为了保证线段树的效率我们可用半开半闭区间(a-1，b]来表示闭区间[a，b]，为什么这样维护更高效呢？比如线段[3，5]，按(a+b)div2

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