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[3 marks] Describe conditions under which an implementation of Quicksort would be slower than a good implementation of Merge

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When input array is sorted or reverse sorted in this case the complexity becomes O(n2) .because in this pivot choosen is either greatest or smallest item.This can be avoided if pivot is randomly choosen but there is no stability in quicksort. In case of merge sort its worst alwatys takes O(n*logn).

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