GATE | GATE-CS-2007 | Question 50

An array of n numbers is given, where n is an even number. The maximum as well as the minimum of these n numbers needs to be determined. Which of the following is TRUE about the number of comparisons needed?
(A) At least 2n – c comparisons, for some constant c, are needed.
(B) At most 1.5n – 2 comparisons are needed.
(C) At least nLog2n comparisons are needed.
(D) None of the above.


Answer: (B)

Explanation: See question 4 of https://www.geeksforgeeks.org/data-structures-and-algorithms-set-12/

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