Search⌘ K
Home
Courses
Algorithms for Coding Interviews in C++

Solution: Merge a Number of Sorted Arrays

Understand how to merge k sorted arrays by applying the divide and conquer strategy. Learn the naive approach and improve it using recursion and efficient merging, reducing time complexity significantly.

We'll cover the following...

Solution # 1

A naive solution to this problem is to append all the k arrays one after another in the output (N∗k)(N*k) array and sort the output array using the std:: sort() function.

Time Complexity

Appending k sorted arrays into one output array would take O(N∗k)O(N*k). Since std::sort() runs in O(log(size))O(log(size)) and the size of the output array is ...