Improved Range Minimum Queries
Héctor Ferrada,Gonzalo Navarro +1 more
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TL;DR: It is shown that, by using instead the BP representation, the formula becomes simpler since border conditions are eliminated and this leads to the fastest and most compact practical implementation to date.
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About: This article is published in Journal of Discrete Algorithms. The article was published on 01 Mar 2017. and is currently open access. The article focuses on the topics: Cartesian tree & Range minimum query.
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Citations
Lempel–Ziv compressed structures for document retrieval
Héctor Ferrada,Gonzalo Navarro +1 more
TL;DR: The first document retrieval structures based on Lempel–Ziv compression, precisely LZ78 are presented, which use 7–10 bpc and dominate a large part of the space/time tradeoffs and enable more efficient partial or approximate answers.
6
An index for moving objects with constant-time access to their compressed trajectories
TL;DR: This paper considers that the objects can move freely and presents a new compressed data structure for storing their trajectories, called ContaCT, based on a combination of logs and snapshots, which outperforms the MVR-tree by orders of magnitude in space and also outperform the compressed representation in time performance.
6
How to answer a small batch of RMQs or LCA queries in practice
Mai Alzamel,Panagiotis Charalampopoulos,Costas S. Iliopoulos,Solon P. Pissis +3 more
- 17 Jul 2017
TL;DR: Existing algorithms can be easily modified to satisfy conditions to answer a small batch of LCA queries and the presented experimental results highlight the practicality of this new scheme.
6
•Posted Content
How to answer a small batch of RMQs or LCA queries in practice
TL;DR: In this paper, the authors proposed a range minimum query (RMQ) algorithm for answering a small batch of Lowest Common Ancestor (LCA) queries, which can be easily modified to satisfy these conditions.
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Efficient transitive operations using binary indexed trees
TL;DR: In this paper, the authors proposed a novel data structure and the algorithms to build, update and perform range query operations of transitive function, which takes O(log(n)) time, and the space required for operating data is also O(cn), where c=3 proving it to be efficient than other data structures such as segment tree and sparse table.
5
References
The LCA Problem Revisited
Michael A. Bender,Martin Farach-Colton +1 more
- 10 Apr 2000
TL;DR: A very simple algorithm for the Least Common Ancestors problem is presented, dispelling the frequently held notion that optimal LCA computation is unwieldy and unimplementable.
Space-efficient static trees and graphs
Guy Jacobson
- 30 Oct 1989
TL;DR: Data structures that represent static unlabeled trees and planar graphs are developed, and there is no other structure that encodes n-node trees with fewer bits per node, as N grows without bound.
861
Scaling and related techniques for geometry problems
Harold N. Gabow,Jon Louis Bentley,Robert E. Tarjan +2 more
- 01 Dec 1984
TL;DR: Three techniques in computational geometry are explored: scaling solves a problem by viewing it at increasing levels of numerical precision; activation is a restricted type of update operation, useful in sweep algorithms; the Cartesian tree is a data structure for problems involving maximums and minimums.
609
From Theory to Practice: Plug and Play with Succinct Data Structures
Simon Gog,Timo Beller,Alistair Moffat,Matthias Petri +3 more
- 29 Jun 2014
TL;DR: This paper presents a framework for experimentation with succinct data structures, providing a large set of configurable components, together with tests, benchmarks, and tools to analyze resource requirements.
398
Space-Efficient Preprocessing Schemes for Range Minimum Queries on Static Arrays
Johannes Fischer,Volker Heun +1 more
TL;DR: This work builds a data structure that allows us to answer efficiently subsequent on-line queries of the form “what is the position of a minimum element in the subarray ranging from $i to $j$?”
312
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