#comparison sort

Merge Sort Program and Complexity (Big-O)

Mergesort is a comparison sort, same as quicksort and based on divide and conquer algorithm. It divides the original data set into smaller pieces of data set to solve the problem and then finally merge these small data sets.

How Merge Sort Works

Merge sort works in the following way:

Merge sort, take middle index in data set and split into two collections : one collection for items left of middle…