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Jump to level 1 numbers = (55, 11, 15, 24, 59, 79, 61, 72, 99, 96) Partition(numbers, 5, 9) is called. Assume quicksort always chooses the element at the midpoint as the pivot. What is the pivot? What is the low partition? What is the high partition? What is numbers after Partition(numbers, 5, 9) completes? ( Ex: 9 Ex: 1, 2, 3 (comma between values)

Jump to level 1 numbers = (55, 11, 15, 24, 59, 79, 61, 72, 99, 96) Partition(numbers, 5, 9) is called. Assume quicksort always chooses the element at the midpoint as the pivot. What is the pivot? What is the low partition? What is the high partition? What is numbers after Partition(numbers, 5, 9) completes? ( Ex: 9 Ex: 1, 2, 3 (comma between values)

Database System Concepts
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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Can someone solve the following problem in the 1st screenshot? For extra help, the rules and hints are provided in the 2nd screenshot with different numbers but same idea (PLEASE HELP)!!!

 

 

 

Expected: pivot: 93 low: 66, 86, 81, 58 high: 93 numbers: (28, 21, 40, 10, 42, 66, 86, 81, 58, 93) The midpoint is 5+ (9-5)/2 = 5 + 2 = 7, so the pivot is numbers[7], which is 93. Since 93 is equal to the pivot and 81 is less than the pivot, the partitioning algorithm swaps 93 and 81 to place 81 in the low partition and 93 in the high partition. numbers is now: (28, 21, 40, 10, 42, 66, 86, 81, 58, 93) The low partition has elements from index 5 to index 8: (66, 86, 81, 58). The high partition has elements from index 9 to index 9: (93). After Partition(numbers, 5, 9) completes, numbers is (28, 21, 40, 10, 42, 66, 86, 81, 58, 93).
Transcribed Image Text:Expected: pivot: 93 low: 66, 86, 81, 58 high: 93 numbers: (28, 21, 40, 10, 42, 66, 86, 81, 58, 93) The midpoint is 5+ (9-5)/2 = 5 + 2 = 7, so the pivot is numbers[7], which is 93. Since 93 is equal to the pivot and 81 is less than the pivot, the partitioning algorithm swaps 93 and 81 to place 81 in the low partition and 93 in the high partition. numbers is now: (28, 21, 40, 10, 42, 66, 86, 81, 58, 93) The low partition has elements from index 5 to index 8: (66, 86, 81, 58). The high partition has elements from index 9 to index 9: (93). After Partition(numbers, 5, 9) completes, numbers is (28, 21, 40, 10, 42, 66, 86, 81, 58, 93).
CHALLENGE ACTIVITY 3.5.1: Quicksort. 403116.2149958.qx3zqy7 Jump to level 1 numbers = (55, 11, 15, 24, 59, 79, 61, 72, 99, 96) Partition (numbers, 5, 9) is called. Assume quicksort always chooses the element at the midpoint as the pivot. What is the pivot? What is the low partition? What is the high partition? 1 Check What is numbers after Partition(numbers, 5, 9) completes? ( Next Ex: 9 2 Ex: 1, 2, 3 (comma between values) 3 4 5 6 > 1 2 3 4 LO 5 6 Feedback?
Transcribed Image Text:CHALLENGE ACTIVITY 3.5.1: Quicksort. 403116.2149958.qx3zqy7 Jump to level 1 numbers = (55, 11, 15, 24, 59, 79, 61, 72, 99, 96) Partition (numbers, 5, 9) is called. Assume quicksort always chooses the element at the midpoint as the pivot. What is the pivot? What is the low partition? What is the high partition? 1 Check What is numbers after Partition(numbers, 5, 9) completes? ( Next Ex: 9 2 Ex: 1, 2, 3 (comma between values) 3 4 5 6 > 1 2 3 4 LO 5 6 Feedback?
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