LeetCode : Convert Sorted Array to Binary Search Tree
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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; * TreeNode *left; * TreeNode *right; * TreeNode(int x) : val(x), left(NULL), right(NULL) {} * }; */class Solution {public: TreeNode* sortedArrayToBST(vector<int>& nums) { if(nums.size()==0) return NULL; if(nums.size()==1) return new TreeNode(nums[0]); int mid = nums.size()/2; vector<int>vleft(nums.begin(),nums.begin()+mid); vector<int>vright(nums.begin()+mid+1,nums.end()); TreeNode *T = new TreeNode(nums[mid]); T->left = sortedArrayToBST(vleft); T->right = sortedArrayToBST(vright); return T; }}; 0 0
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