Given an integer array nums where the elements are sorted in ascending order, convert it to a height-balanced binary search tree.

Example 1:

• Input: nums = [-10,-3,0,5,9]
• Output: [0,-3,9,-10,null,5]
• Explanation: [0,-10,5,null,-3,null,9] is also accepted:

Example 2:

• Input: nums = [1,3]
• Output: [3,1]
• Explanation: [1,null,3] and [3,1] are both height-balanced BSTs.

Constraints:

• 1 <= nums.length <= 104
• -104 <= nums[i] <= 104
• nums is sorted in a strictly increasing order.