During each iteration of Quick Sort algorithm, the first element of array is selected as a pivot. The algorithm for Quick Sort is given below. Modify it in such a way that last element of array should be selected as a pivot at each iteration. Also explain the advantages.

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
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During each iteration of Quick Sort algorithm, the first element of array is selected as a pivot. The algorithm for Quick Sort is given below. Modify it in such a way that last element of array should be selected as a pivot at each iteration. Also explain the advantages.

 

Quick-Sort(A, left, right)
left 2 right
if
return
else
middle -
Partition (A, left, right)
Quick-Sort(A, left, middle-1 )
Quick-Sort(A, middle+1, right)
end if
Partition (A, left, right)
x - A[left]
i
left
for j - left+1 to right
if A[j] < x then
i - i + 1
swap (A[i], A[j])
end if
end for j
swap (A[i], A[left])
return i
Transcribed Image Text:Quick-Sort(A, left, right) left 2 right if return else middle - Partition (A, left, right) Quick-Sort(A, left, middle-1 ) Quick-Sort(A, middle+1, right) end if Partition (A, left, right) x - A[left] i left for j - left+1 to right if A[j] < x then i - i + 1 swap (A[i], A[j]) end if end for j swap (A[i], A[left]) return i
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