Optimal Succinctness for Range Minimum Queries
Optimal Succinctness for Range Minimum Queries
复制标题
范围最小查询的最佳简洁性
DOI:
10.1007/978-3-642-12200-2_16
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发表时间:
2008
期刊:
影响因子:
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通讯作者:
J. Fischer
中科院分区:
文献类型:
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作者:
J. Fischer
For a static array A of n totally ordered objects, a range minimum query asks for the position of the minimum between two specified array indices. We show how to preprocess A into a scheme of size 2n+o(n) bits that allows to answer range minimum queries on A in constant time. This space is asymptotically optimal in the important setting where access to A is not permitted after the preprocessing step. Our scheme can be computed in linear time, using only n+o(n) additional bits for construction. We also improve on LCA-computation in BPS- or DFUDS-encoded trees.