leetcode[108]:Convert Sorted Array to Binary Search Tree
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Convert Sorted Array to Binary Search Tree
Given an array where elements are sorted in ascending order, convert it to a height balanced BST.
/** * Definition for a binary tree node. * struct TreeNode { * int val; * struct TreeNode *left; * struct TreeNode *right; * }; */struct TreeNode* sortedArrayToBST(int* nums, int numsSize) { struct TreeNode* tmp; if(numsSize==0) return NULL; tmp=(struct TreeNode*)malloc(sizeof(struct TreeNode*)); tmp->val=nums[numsSize/2]; tmp->left=sortedArrayToBST(nums, numsSize/2); if(numsSize%2==0) tmp->right=sortedArrayToBST(nums+numsSize/2+1, numsSize/2-1); else tmp->right=sortedArrayToBST(nums+numsSize/2+1, numsSize/2); return tmp;}折半，递归。
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