Open In App
Related Articles

GATE | GATE CS 1996 | Question 40

Improve
Improve
Improve
Like Article
Like
Save Article
Save
Report issue
Report

Quicksort is run on two inputs shown below to sort in ascending order taking the first element as pivot,

(i) 1, 2, 3,......., n
(ii) n, n-1, n-2,......, 2, 1 

Let C1 and C2 be the number of comparisons made for the inputs (i) and (ii) respectively. Then,

(A)

C1 < C2 
 

(B)

C1 > C2

(C)

C1 = C2

(D)

We cannot say anything for arbitrary n



Answer: (C)

Explanation:

Quick Sort performs in the worst case when input is sorted in either ascending order or descending order. So, quick sort will return equal number of comparisons for both given inputs. Option (C) is correct.



Quiz of this Question
Please comment below if you find anything wrong in the above post

Last Updated : 12 Dec, 2018
Like Article
Save Article
Previous
Next
Share your thoughts in the comments
Similar Reads