Mergeable heaps

前言

    本文目的在于对几种构建可合并堆的方式进行总体比较；并对每种方式分别从伪代码，具体实现，消耗计算等三方面进行总结；以达到对该类型问题有较清楚的认识。

简介

     可合并堆是指对外提供以下接口的堆

1. MAKE-HEAP( ) creates and returns a new heap containing no elements.

2. INSERT(H,x) inserts element x, whose key has already been filled in, into heap H. MINIMUM(H) returns a pointer to the element in heap H whose key is minimum.

3. EXTRACT-MIN(H) deletes the element from heap H whose key is minimum, returning a pointer to the element.

4. UNION(H1;H2) creates and returns a new heap that contains all the elements of
   heaps H1 and H2. Heaps H1 and H2 are “destroyed” by this operation.

   
   

   In addition to the mergeable-heap operations above, Fibonacci heaps also support
   the following two operations:

5. DECREASE-KEY(H, x, k) assigns to element x within heap H the new key
   value k, which we assume to be no greater than its current key value.

6. DELETE(H, x) deletes element x from heap H.

实现方式总体比较

参考文章

1. 算法导论 第三版

2. http://www.cnblogs.com/xuqiang/archive/2011/06/01/2065549.html

IN BUILDING