Top "Quicksort" questions

Quicksort is a sorting algorithm invented by C. A. R. Hoare that has an average-case complexity of O(n log n) and worst-case quadratic complexity.

Intuitive explanation for why QuickSort is n log n?

Is anybody able to give a 'plain english' intuitive, yet formal, explanation of what makes QuickSort n log n? From …

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What's the difference between quicksort and mergesort?

Am I right in saying that in both algorithms, all you're doing is taking your structure, recursively splitting it into …

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quicksort algorithm stability

Quicksort is not stable, since it exchanges nonadjacent elements. Please help me understanding this statement. I know how partitioning works, …

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Is Quicksort in-place or not?

So the space efficiency of Quicksort is O(log(n)). This is the space required to maintain the call stack. …

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Python Quicksort Runtime Error: Maximum Recursion Depth Exceeded in cmp

I'm writing a program that will read a text file containing 5,163 names. (text file can be seen here) Then I …

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How to sort an array in a single loop?

So I was going through different sorting algorithms. But almost all the sorting algorithms require 2 loops to sort the array. …

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Stability of quicksort partitioning approach

Does the following Quicksort partitioning algorithm result in a stable sort (i.e. does it maintain the relative position of …

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How to optimize quicksort

I am trying to work out an efficient quicksort algo. It works okay, but takes long time to run when …

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What's the difference of dual pivot quick sort and quick sort?

I've never seen dual pivot quick sort before. If it is a upgrade edition of quick sort? And what is …

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QuickSort and Hoare Partition

I have a hard time translating QuickSort with Hoare partitioning into C code, and can't find out why. The code …

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