leetcode Convert Sorted Array to Binary Search Tree
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/** * Definition for binary tree * struct TreeNode { * int val; * TreeNode *left; * TreeNode *right; * TreeNode(int x) : val(x), left(NULL), right(NULL) {} * }; */class Solution {public: TreeNode *build(vector<int>&num,int &cur,int st,int en) { if(st>en)return NULL; int mid = st + (en-st)/2; TreeNode* left = build(num,cur,st,mid-1); TreeNode* res = new TreeNode(num[cur]); cur++; TreeNode* right = build(num,cur,mid+1,en); res->left = left; res->right= right; return res; } TreeNode *sortedArrayToBST(vector<int> &num) { // Start typing your C/C++ solution below // DO NOT write int main() function int cur=0; return build(num,cur,0,(int)num.size()-1); }};- 【LeetCode】Convert Sorted Array to Binary Search Tree && Convert Sorted List to Binary Search Tree
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