Answered: maintains an attribute component…

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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In this exercise we are going to modify the DFS procedure so that it returns for the given undirected graph G, the connected components of that graph. To do this we will modify the DFS procedure so that it computes the connected components as follows: • It maintains a counter i, initially set in 1, that counts how many connected components we found so far • On each vertex v ∈ G.V it maintains an attribute component indicating to which connected component number v belong to. That is, when DFS terminates, v.component indicates the component number 1, 2, . . . i that v belongs to. Answer the following questions: (a) Write the pseudocode for this slightly modified version of the DFS algorithm (b) Explain why your algorithm is correct (c) Explain its running time.

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