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The Cartographer
Counting Inversions Adaptively
March 04, 2015 Β· Declared Dead Β· π Information Processing Letters
"No code URL or promise found in abstract"
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Authors
Amr Elmasry
arXiv ID
1503.01192
Category
cs.DS: Data Structures & Algorithms
Citations
1
Venue
Information Processing Letters
Last Checked
4 months ago
Abstract
We give a simple and efficient algorithm for adaptively counting inversions in a sequence of $n$ integers. Our algorithm runs in $O(n + n \sqrt{\lg{(Inv/n)}})$ time in the word-RAM model of computation, where $Inv$ is the number of inversions.
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