The complexity of the merge sort … Merge sort is one of the most efficient sorting techniques and it’s based on the “divide and conquer” paradigm. Merge sort is an O(n log n) comparison-based sorting algorithm. How Sorting is Performed in C? When you have a large data collection that is not arranged and it requires you to search a particular data set in the collection then a sorting technique is used to arrange large data in a sequence. Merge sort algorithm uses the “divide and conquer” strategy wherein we divide the problem into subproblems and solve those subproblems individually. In C programming language, there are multiple sorting algorithms available, which can be incorporated inside the code. The two unsorted lists are then sorted and merged to get a sorted list. It takes the list to be sorted and divide it in half to create two unsorted lists. Most implementations produce a stable sort, which means that the implementation preserves the input order of equal elements in the sorted output. Otherwise, divide the unsorted array into two sub-arrays of about half the size. Definition. Merge Sort in C is a sorting algorithm. Merge the two sub-arrays to form a single sorted list. The two unsorted lists are sorted by continually calling the merge-sort algorithm; we eventually get a list of size 1 which is already sorted. The various types of sorting methods possible in the C language are Bubble sort, Selection sort, Quick sort, Merge sort, Heap sort and Insertion sort. Merge sort is based on Divide and conquer method. C Program for Merge Sort Use merge sort algorithm recursively to sort each sub-array. C++ Merge Sort Technique. How Merge Sort Works inC Merge Sort is an example of the divide and conquer approach.It divides the array into equal halves and then combine in a sorted manner.In merge sort the unsorted list is divided into N sub lists, each having one element. The basic steps of a merge sort algorithm are as follows: If the array is of length 0 or 1, then it is already sorted. These subproblems are then combined or merged together to form a unified solution. In merge sort, the problem is divided into two subproblems in every iteration. => Read Through The Popular C++ … Let us learn how sorting is performed in C: Merge the two arrays in steps 2 and 3 with the help of the merge function.merge(a, low, middle, high); From the following diagram, we can see how the array is divided into two halves till the size becomes 1 and then recursively merged into one array. Hence efficiency is increased drastically. 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