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单词 Q sort
释义

Q sort

中文百科

快速排序 Quicksort

（重定向自Q sort）
快速排序采用「分而治之、各个击破」的观念，此为原地（In-place）分割版本。

快速排序（英语：Quicksort），又称划分交换排序（partition-exchange sort），一种排序算法，最早由东尼·霍尔提出。在平均状况下，排序n个项目要Ο(n log n)次比较。在最坏状况下则需要Ο(n)次比较，但这种状况并不常见。事实上，快速排序通常明显比其他Ο(n log n)算法更快，因为它的内部循环（inner loop）可以在大部分的架构上很有效率地被实现出来。

英语百科

Quicksort 快速排序

（重定向自Q sort）
Full example of quicksort on a random set of numbers. The shaded element is the pivot. It is always chosen as the last element of the partition. However, always choosing the last element in the partition as the pivot in this way results in poor performance (O(n²)) on already sorted arrays, or arrays of identical elements. Since sub-arrays of sorted / identical elements crop up a lot towards the end of a sorting procedure on a large set, versions of the quicksort algorithm which choose the pivot as the middle element run much more quickly than the algorithm described in this diagram on large sets of numbers.
快速排序采用「分而治之、各个击破」的观念，此为原地（In-place）分割版本。
Autre illustration de l'algorithme de tri rapide (Quicksort).

Quicksort (sometimes called partition-exchange sort) is an efficient sorting algorithm, serving as a systematic method for placing the elements of an array in order. Developed by Tony Hoare in 1959, with his work published in 1961, it is still a commonly used algorithm for sorting. When implemented well, it can be about two or three times faster than its main competitors, merge sort and heapsort.
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更新时间：2025/6/19 18:14:31