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Tag Archives: Quick Sort

Why is Quick Sort preferred for arrays? Below are recursive and iterative implementations of Quick Sort and Merge Sort for arrays. Recursive Quick Sort for… Read More
The worst case time complexity of a typical implementation of QuickSort is O(n2). The worst case occurs when the picked pivot is always an extreme… Read More
Given a set of n nuts of different sizes and n bolts of different sizes. There is a one-one mapping between nuts and bolts. Match… Read More
We recommend reading the following post as a prerequisite of this post. K’th Smallest/Largest Element in Unsorted Array | Set 1 Given an array and… Read More
Given an array and a number k where k is smaller than the size of the array, we need to find the k’th largest element… Read More
What is tail recursion? A recursive function is tail recursive when a recursive call is the last thing executed by the function. For example the following… Read More
Like Merge Sort, QuickSort is a Divide and Conquer algorithm. It picks an element as a pivot and partitions the given array around the picked… Read More
Similar to the Merge Sort algorithm, the Quick Sort algorithm is a Divide and Conquer algorithm. It initially selects an element as a pivot element… Read More
Like Merge Sort, QuickSort is a Divide and Conquer algorithm. It picks an element as pivot and partitions the given array around the picked pivot.… Read More
Just unlikely merge Sort, QuickSort is a divide and conquer algorithm. It picks an element as a pivot and partitions the given array around the… Read More
Given a linked list, apply the Quick sort algorithm to sort the linked list. The important things about implementation are, that it changes pointers rather… Read More
Following is a typical recursive implementation of QuickSort for arrays. The implementation uses last element as pivot.  C++ /* A typical recursive implementation of Quicksort… Read More
Standard C library provides qsort() that can be used for sorting an array. As the name suggests, the function uses QuickSort algorithm to sort the… Read More
Following is a typical recursive implementation of Quick Sort that uses last element as pivot.   C++ // CPP code for recursive function of Quicksort #include… Read More
Stability is mainly important when we have key value pairs with duplicate keys possible (like people names as keys and their details as values). And… Read More

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