Challenge: Inversion Count in an Array
Explore how to determine the inversion count of an array, which measures how far it is from being sorted. Learn to identify inversions using indices and apply divide and conquer strategies to count these efficiently. This lesson helps you develop a clear algorithmic approach before coding, enhancing your problem-solving skills for technical interviews.
We'll cover the following...
We'll cover the following...
What is the inversion count?
Inversion count represents how far or close an array is from being sorted. If an array is sorted, the inversion count will be 0. But if it’s sorted in the reverse order, the inversion count will be maximum.
Consider indices i and j, such that i < j and arr[i] > ...