Question: Given the head of a singly linked list where elements are sorted in ascending order , convert it to a height-balanced binary search tree .

Given the head of a singly linked list where elements are sorted in ascending order, convert it to a

height-balanced

binary search tree.

Example 1:

-10 -10 -3 -3 5 9 5 9

Input:

head = [-10,-3,0,5,9]Output: [0,-3,9,-10,null,5]Explanation: One possible answer is [0,-3,9,-10,null,5], which represents the shown height balanced BST.

Example 2:

Input:

head = []Output: []

Constraints:

The number of nodes in head is in the range [0, 2 * 10⁴].
-10⁵

-10 -10 -3 -3 5 9 5 9

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