Quicksort is run on two inputs shown below to sort in ascending order taking 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,

The recurrence relation that arises in relation with the complexity of binary search is:

Assume that the last element of the set is used as partition element in Quicksort. If n distinct elements from the set [1…n] are to be sorted, give an input for which Quicksort takes maximum time.

Find a solution to the following recurrence equation
T(n) = T(n - 1)+ n
T(1) = 1