Exercise 9. Describe in plain English an algorithm that computes the number of common elements in 2 arrays of integers. You can assume that there are no duplicates in the first array, and also no duplicates in the second array. For example if array a₁ = [9, 3, 1, 5, 7, 11] and array a2 = [6, 2, 7, 8, 10, 5, 1], the algorithm should return 3 because the two arrays have three numbers in common, namely 1,5,7. Your algorithm should run in O(n log n) time.

Exercise 9. Describe in plain English an algorithm that computes the number of common elements in 2 arrays of integers. You can assume that there are no duplicates in the first array, and also no duplicates in the second array. For example if array a₁ = [9, 3, 1, 5, 7, 11] and array a2 = [6, 2, 7, 8, 10, 5, 1], the algorithm should return 3 because the two arrays have three numbers in common, namely 1,5,7. Your algorithm should run in O(n log n) time.

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

Exercise 9. Describe in plain English an algorithm that computes the number of common elements in
2 arrays of integers. You can assume that there are no duplicates in the first array, and also no duplicates in
the second array. For example if array a₁ = [9, 3, 1, 5, 7, 11] and array a2 = [6, 2, 7, 8, 10, 5, 1], the algorithm
should return 3 because the two arrays have three numbers in common, namely 1,5,7. Your algorithm
should run in O(n log n) time.

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