Counting Inversions in an Array

December 17, 2023

Problem # Given an array of integers, count the number of inversions, where an inversion is a pair of integers (i, j) such that i < j and arr[i] > arr[j]. Solution # To solve the problem of counting the number of inversions in an array, where an inversion is defined as a pair of indices ((i, j)) such that (i < j) and (\text{arr}[i] > \text{arr}[j]), we can use a modified version of the merge sort algorithm. ...