LeetCode 108. Convert Sorted Array to Binary Search Tree
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给定升序数组，构造平衡查找二叉树。
代码：
class Solution {public: TreeNode *sortedArrayToBST(vector<int> &num) { return gao(num, 0, num.size()); }private:TreeNode *gao(vector<int>& num, int begin, int end){if (begin >= end){return NULL;}TreeNode *node = new TreeNode(num[ (end-begin)/2 ]);node->left = gao(num, begin, (end-begin)/2-1);node->right = gao(num, (end-begin)/2+1, end);return node;}}; 0 0
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