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Quicksort Algorithm

Quicksort Algorithm
Animated visualization of the quicksort algorithm. The horizontal lines are pivot values.
Class	Sorting algorithm
Worst-case performance	O(n²)
Best-case performance	O(n log n) (simple partition) or O(n) (three-way partition and equal keys)
Average performance	O(n log n)
Worst-case space complexity	O(n) auxiliary (naive) O(log n) auxiliary (Hoare 1962)
Optimal	No

Usage

((Infobox algorithm
|name           = <!-- Defaults to article name -->
|class          = <!-- Name of problem it solves -->
|image          = <!-- filename only, no "File:" or "Image:" prefix, and no enclosing [[brackets]] -->
|caption        =
|data           =
|time           = <!-- Worst time big-O notation -->
|best-time      =
|average-time   =
|space          = <!-- Worst-case space complexity; auxiliary space
                       (excluding input) if not specified -->
))

Infobox describing an algorithm

Template parameters[Edit template data]
Parameter		Description	Type	Status
Name	`name`	Name of algorithm Default ((PAGENAMEBASE)) Auto value `((PAGENAMEBASE))`	Content	required
Problem class	`class`	Type of problem it solves Example Sorting Auto value	Content	required
Image	`image`	filename only, no 'File:' or 'Image:' prefix, and no enclosing [[brackets]]	Content	optional
Image size	`size` `image size` `imagesize` `image_size`	no description	Unknown	optional
Alt text	`alt`	Alt text for image	String	optional
Caption	`caption`	no description	Content	optional
Data structure	`data`	Data structure operated upon Example Array	Content	required
Worst-case time complexity	`time`	Worst-case time complexity in big O notation Example O(n)	Content	required
Best-case time complexity	`best-time`	no description	Content	optional
Average time complexity	`average-time`	no description	Content	optional
Worst-case space complexity	`space`	If not specified, this should be auxiliary space complexity and not include the space needed for the input Example O(1)	Content	required

The above documentation is transcluded from Template:Infobox algorithm/doc.
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