You have a family tree diagram like the following, very small, sample tree and file. It is stored as a file with the following format (parent: , one line for all people in the tree). Your task is to be able to find the descendants of any person in a family tree, e.g. the descendants of p1 are p4.p5,p7,p8 in O(|PI) time, where P is the set of people in the graph. "Sketching" the approach is fine but you may give full pseudocode, just reuse an algorithm from class, perform some obvious conversion (Adjacency Matrix to/from Array List, etc.) or some combination of these. You may not use depth first search or breadth first search. You may preprocess the input with any polynomial approach and may assume the |P| people in the tree are labelled po, p1, ..p. p0: p4, p5 pl: p4, p5 p2: p6 p3: p6 p4:

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
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2. You have a family tree diagram like the following, very smallI, sample tree and file. It is stored as
a file with the following format (parent: <list of children>, one line for all people in the tree).
Your task is to be able to find the descendants of any person in a family tree, e.g. the
descendants of p1 are p4.p5,p7,p8 in O(|P|) time, where P is the set of people in the graph.
"Sketching" the approach is fine but you may give full pseudocode, just reuse an algorithm from
class, perform some obvious conversion (Adjacency Matrix to/from Array List, etc.) or some
combination of these. You may not use depth first search or breadth first search. You may
preprocess the input with any polynomial approach and may assume the |P| people in the tree
are labelled po, p1, .p<n-1>.
p0: p4, p5
p1: p4, p5
p2: p6
p3: p6
p4:
p4
p5: p7, p8
p6: p7, p8
p7:
p8:
p7
p8
Preprocess File By:
How to retrieve descendants (O(|P|) time, max):
getDescendants(Person <,possibly some other Data Structure>):
Transcribed Image Text:2. You have a family tree diagram like the following, very smallI, sample tree and file. It is stored as a file with the following format (parent: <list of children>, one line for all people in the tree). Your task is to be able to find the descendants of any person in a family tree, e.g. the descendants of p1 are p4.p5,p7,p8 in O(|P|) time, where P is the set of people in the graph. "Sketching" the approach is fine but you may give full pseudocode, just reuse an algorithm from class, perform some obvious conversion (Adjacency Matrix to/from Array List, etc.) or some combination of these. You may not use depth first search or breadth first search. You may preprocess the input with any polynomial approach and may assume the |P| people in the tree are labelled po, p1, .p<n-1>. p0: p4, p5 p1: p4, p5 p2: p6 p3: p6 p4: p4 p5: p7, p8 p6: p7, p8 p7: p8: p7 p8 Preprocess File By: How to retrieve descendants (O(|P|) time, max): getDescendants(Person <,possibly some other Data Structure>):
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