Output: The inversion count is 5
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Question
Given an array, find the total number of inversions of it. If (i < j) and (A[i] > A[j]), then pair (i, j) is called an inversion of an array A. We need to count all such pairs in the array.
For example,
Input: A[] = [1, 9, 6, 4, 5]
Output: The inversion count is 5
There are 5 inversions in the array: (9, 6), (9, 4), (9, 5), (6, 4), (6, 5)
Output: The inversion count is 5
There are 5 inversions in the array: (9, 6), (9, 4), (9, 5), (6, 4), (6, 5)
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