I met another problem (at the same forum) that has a tag of "data structures" but I can't seem to find a solution.

Given an array of n elements, divide into the minimum number of consecutive of subarrays that satifies the following conditions or determine if that is impossible:

• Every element belongs to an exact subarray

• The median of each subarray must be non-negative

• Let array B be the array of the medians of the subarrays. The average of all elements of B must be be d (d is given)

• Let array C be the array of the averages of each subarray. The median of C should be k (k is given)

• B and C are both non-decreasing.

Please help. Thank you in advance!