1 #Suppose you have a random list of people standing in a queue. 2 # Each person is described by a pair of integers (h, k), 3 #where h is the height of the person and k is the number of people. 4 # in front of this person who have a height greater than or equal to h. #Write an algorithm to reconstruct the queue. 5 6 7 8 9 # Note: # The number of people is less than 1,100. 10 11 12 # Input: 13 14 15 # Output: 16 # [[5,0], [7,0], [5,2], [6,1], [4,4], [7,1]] 17 18 def reconstruct_queue (people): 19 20 21 22 23 24 25 26 27 # Example # [[7,0], [4,4], [7,1], [5,0], [6,1], [5,2]] www. :type people: List[List[int]] :rtype: List[List[int]] queue [] people.sort(key-lambda x: (-x[0], x[1])) for h, k in people: queue.insert(k, [h, k]) return queue

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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1 #Suppose you have a random list of people standing in a queue.
# Each person is described by a pair of integers (h, k),
#where h is the height of the person and k is the number of people
# in front of this person who have a height greater than or equal to h.
# Write an algorithm to reconstruct the queue.
2
3
4
5
6
7
8
9
# Note:
# The number of people is less than 1,100.
# Example
10
11
12 #Input:
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
# [[7,0], [4,4], [7,1], [5,0], [6,1], [5,2]]
# Output:
# [[5,0], [7,0], [5,2], [6,1], [4,4], [7,1]]
def reconstruct_queue (people):
type people: List[List[int]]
:rtype: List[List[int]]
www
queue = []
people.sort(key=lambda x: (-x[0], x[1]))
for h, k in people:
queue.insert(k, [h, k])
return queue
Transcribed Image Text:1 #Suppose you have a random list of people standing in a queue. # Each person is described by a pair of integers (h, k), #where h is the height of the person and k is the number of people # in front of this person who have a height greater than or equal to h. # Write an algorithm to reconstruct the queue. 2 3 4 5 6 7 8 9 # Note: # The number of people is less than 1,100. # Example 10 11 12 #Input: 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 # [[7,0], [4,4], [7,1], [5,0], [6,1], [5,2]] # Output: # [[5,0], [7,0], [5,2], [6,1], [4,4], [7,1]] def reconstruct_queue (people): type people: List[List[int]] :rtype: List[List[int]] www queue = [] people.sort(key=lambda x: (-x[0], x[1])) for h, k in people: queue.insert(k, [h, k]) return queue
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