Given an array where elements are sorted in ascending order, convert it to a height balanced BST.
解题思路：
首先要理解，什么叫做height balanced BST Java for LeetCode 110 Balanced Binary Tree，然后就十分容易了，JAVA实现如下：
public TreeNode sortedArrayToBST(int[] nums) {
return sortedArrayToBST(nums, 0, nums.length - 1);
}
static public TreeNode sortedArrayToBST(int[] nums, int begin, int end) {
if (begin>end)
return null;
TreeNode root = new TreeNode(nums[(begin+end) / 2]);
root.left=sortedArrayToBST(nums,begin,(begin+end) / 2-1);
root.right=sortedArrayToBST(nums,(begin+end) / 2+1,end);
return root;
}
Java for LeetCode 108 Convert Sorted Array to Binary Search Tree
原文：http://www.cnblogs.com/tonyluis/p/4524790.html