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Shadow heap : ウィキペディア英語版
Shadow heap
In computer science, a shadow heap is a mergeable heap data structure which supports efficient heap merging in the amortized sense. More specifically, shadow heaps make use of the shadow merge algorithm to achieve insertion in ''O''(f(''n'')) amortized time and deletion in ''O''((log ''n'' log log ''n'')/f(''n'')) amortized time, for any choice of 1 ≤ f(''n'') ≤ log log ''n''.
Throughout this article, it is assumed that ''A'' and ''B'' are binary heaps with |''A''| ≤ |''B''|.
==Shadow merge==
Shadow merge is an algorithm for merging two binary heaps efficiently if these heaps are implemented as arrays. Specifically, the running time of shadow merge on two heaps A and B is O(|A| + \min\).

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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