The Quick Union implementation assumes that the root nodes are assigned a parent ID of “-1". If I wanted to change this and set root nodes to have a parent ID of "O" instead of "-1", which lines in the following code would change? Select all that should change.
The Quick Union implementation assumes that the root nodes are assigned a parent ID of “-1". If I wanted to change this and set root nodes to have a parent ID of "O" instead of "-1", which lines in the following code would change? Select all that should change.
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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![The Quick Union implementation assumes that the root nodes are assigned a parent ID of “-1".
If I wanted to change this and set root nodes to have a parent ID of "0" instead of "-1", which
lines in the following code would change? Select all that should change.
1
class QuickUnion:
def
init (self, size: int) -> None:
CHOICES (Select all that may apply.)
4
size: number of elements to initialize
6.
self.size = size
a. None of the above
7
self.parent = [-1]*self.size
b. Line 16
8.
c. Line 15
str_(self) -> str:
return f"parent: {self.parent}"
9.
def
10
d. Line 26
11
def get_root(self, p: int) -> int:
""Find the root of p"""
12
e. Line 20
13
f. Line 7
14
idx = p
while self. parent[idx] >= 0:
idx = self.parent[idx]
15
16
17
return idx
18
def is connected(self, pl: int, p2:int) -> bool:
return self.get_root(p1) == self.get_root(p2)
19
20
21
def connect (self, pl: int, p2: int) -> None:
"""Connects pl and p2"" "
rl = self.get_root(p1)
r2 = self.get_root(p2)
self.parent[rl] = r2
22
23
24
25
26](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F6beb26cd-f7b4-4fb5-8e99-f0010888004d%2F74801011-7842-45fc-a72a-ab2d5f32c5c4%2F1meacyi_processed.png&w=3840&q=75)
Transcribed Image Text:The Quick Union implementation assumes that the root nodes are assigned a parent ID of “-1".
If I wanted to change this and set root nodes to have a parent ID of "0" instead of "-1", which
lines in the following code would change? Select all that should change.
1
class QuickUnion:
def
init (self, size: int) -> None:
CHOICES (Select all that may apply.)
4
size: number of elements to initialize
6.
self.size = size
a. None of the above
7
self.parent = [-1]*self.size
b. Line 16
8.
c. Line 15
str_(self) -> str:
return f"parent: {self.parent}"
9.
def
10
d. Line 26
11
def get_root(self, p: int) -> int:
""Find the root of p"""
12
e. Line 20
13
f. Line 7
14
idx = p
while self. parent[idx] >= 0:
idx = self.parent[idx]
15
16
17
return idx
18
def is connected(self, pl: int, p2:int) -> bool:
return self.get_root(p1) == self.get_root(p2)
19
20
21
def connect (self, pl: int, p2: int) -> None:
"""Connects pl and p2"" "
rl = self.get_root(p1)
r2 = self.get_root(p2)
self.parent[rl] = r2
22
23
24
25
26
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