Top-k Color Queries on Tree Paths

被引：0
|
作者：
Durocher, Stephane [1 ]
Shah, Rahul [2 ]
Skala, Matthew [1 ]
Thankachan, Sharma V. [2 ]
机构：
[1] Univ Manitoba, Winnipeg, MB, Canada
[2] Louisiana State Univ, Baton Rouge, LA 70803 USA
来源：
STRING PROCESSING AND INFORMATION RETRIEVAL (SPIRE 2013) | 2013年 / 8214卷
基金：
美国国家科学基金会; 加拿大自然科学与工程研究理事会;
关键词：
RANGE; ALGORITHMS;
D O I：
暂无
中图分类号：
TP18 [人工智能理论];
学科分类号：
081104 ; 0812 ; 0835 ; 1405 ;
摘要：
We present a data structure for the following problem: Given a tree tau, with each of its nodes assigned a color in a totally ordered set, preprocess tau to efficiently answer queries for the top k distinct colors on the path between two nodes, reporting the colors sorted in descending order. Our data structure requires linear space of O(n) words and answers queries in O(k) time.
引用
收藏
页码：109 / 115
页数：7
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