Given an integer array nums, return an integer array counts where counts[i] is the number of smaller elements to the right of nums[i].

  Example 1:

Input: nums = [5,2,6,1] Output: [2,1,1,0] Explanation: To the right of 5 there are 2 smaller elements (2 and 1). To the right of 2 there is only 1 smaller element (1). To the right of 6 there is 1 smaller element (1). To the right of 1 there is 0 smaller element.

Example 2:

Input: nums = [-1] Output: [0]

Example 3:

Input: nums = [-1,-1] Output: [0,0]

  Constraints:

1 <= nums.length <= 10⁵
-10⁴ <= nums[i] <= 10⁴