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Leetcode Question: 109 **********************************************

109. Convert Sorted List to Binary Search Tree

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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:

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 <= Node.val <= 105

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Solutions: Python   Java  C++
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