6
18
2016
0

【NOI模拟赛#3 T2】【主席树套线段树】【倍增】线段树Segment

题意:

Tag:

线段树维护区间并

可持久化线段树计算“前一个覆盖到这个端点的操作”

预处理倍增数组快速完成遍历

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