LintCode线段树/扫描线/查询题总结 - Logan's - CSDN博客



LintCode线段树/扫描线/查询题总结 - Logan's - CSDN博客

线段树(Segment Tree)又叫区间树(Interval Tree),它实际上是一颗二叉树,树种的每一个节点表示一个区间[a, b],左儿子的区间是[a, (a+b)/2],右儿子的区间是[(a+b)/2+1, b]

线段树常用于区间统计/查询相关的问题:比如某些数据可以按区间进行划分,按区间动态进行修改,而且还需要按区间多次进行查询,那么使用线段树可以达到较快查询速度。动态的求/更新区间和、区间最值就适用于用线段树来求解。


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