12 - Divide and Conquer: Counting Inversions
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions
Define what an inversion is in a list.
💡 Hint: Think about the order of elements in an array.
What does the divide and conquer method entail?
💡 Hint: Remember the steps of the algorithm.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What is an inversion in a sequence?
💡 Hint: Think about how we define ordering in a list.
True or False: A divide and conquer strategy can be used to count inversions efficiently.
💡 Hint: Recall the efficiency compared to a brute force method.
Get performance evaluation
Challenge Problems
Push your limits with advanced challenges
Determine the number of inversions for the following array: [2, 3, 8, 6, 1]. Explain the process you used.
💡 Hint: List pairs in order and check their indices.
Consider two rankings, A = [3, 1, 2] and B = [1, 3, 2]. Calculate the number of inversions and describe how you derived the count.
💡 Hint: Focus on how elements are ranked in both A and B.
Get performance evaluation
Reference links
Supplementary resources to enhance your learning experience.