How fast is qsort

Save Article. Improve Article. Like Article. Next Find smallest range containing elements from k lists. Recommended Articles. Sort all even numbers in ascending order and then sort all odd numbers in descending order. Article Contributed By :. Easy Normal Medium Hard Expert. Writing code in comment? Please use ide.

Load Comments. Privacy policy. Skip to main content. This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. Is this page helpful? Yes No. Unlike array, in linked list, we can insert items in the middle in O 1 extra space and O 1 time.

Therefore merge operation of merge sort can be implemented without extra space for linked lists. In arrays, we can do random access as elements are continuous in memory.

Unlike arrays, we can not do random access in linked list. Quick Sort requires a lot of this kind of access. Therefore, the overhead increases for quick sort. Merge sort accesses data sequentially and the need of random access is low. How to optimize QuickSort so that it takes O Log n extra space in worst case?

Skip to content. Change Language. Related Articles. Save Article. Improve Article. Like Article. Python3 implementation of QuickSort. This Function handles sorting part of quick sort. Initializing pivot's index to start. This loop runs till start pointer crosses. Increment the start pointer till it finds an. Decrement the end pointer till it finds an.

If start and end have not crossed each other,. Swap pivot element with element on end pointer. Returning end pointer to divide the array into 2.

The main function that implements QuickSort. Sort elements before partition. This code is contributed by Adnan Aliakbar. Previous Merge Sort. Next HeapSort. Recommended Articles.