Answered: , 12: {10, 3, 6}, 13: {1}, 14: set(),…

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

Python

Write a function named cut_vertices() which returns the list of cut vertices. This output should be given as a set.

>>> G={0: set(), 1: {11, 10, 19, 13}, 2: {11, 3, 5}, 3: {9, 2, 12, 17}, 4: {10, 5}, 5: {2, 19, 4, 6}, 6: {12, 5}, 7: {11}, 8: {18}, 9: {10, 3}, 10: {9, 12, 4, 1}, 11: {1, 2, 7}, 12: {10, 3, 6}, 13: {1}, 14: set(), 15: {16}, 16: {15}, 17: {3}, 18: {8}, 19: {1, 5}}
>>>
>>> cut_vertices(G)
{11, 1, 3}
>>> cut_vertices(C(6))
set()
>>> cut_vertices(P(6))
{2, 3, 4, 5}
>>> cut_vertices(S(6))
{1}

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