二叉搜索树的范围和c语言,Leetcode 938.二叉搜索树的范围和

Leetcode 938.二叉搜索树的范围和

题解：

这里是用了dfs搜索

/**

* Definition for a binary tree node.

* struct TreeNode {

* int val;

* TreeNode *left;

* TreeNode *right;

* TreeNode() : val(0), left(nullptr), right(nullptr) {}

* TreeNode(int x) : val(x), left(nullptr), right(nullptr) {}

* TreeNode(int x, TreeNode *left, TreeNode *right) : val(x), left(left), right(right) {}

* };

*/

class Solution {

public:

int dfs(TreeNode *r, int low, int high){

int res = 0;

if (r->val >= low && r->val <= high) res = r->val;

if (r->left != NULL) res += dfs(r->left, low, high);

if (r->right != NULL) res += dfs(r->right, low, high);

return res;

}

int rangeSumBST(TreeNode* root, int low, int high) {

int res = 0;

res = dfs(root, low, high);

return res;

}

};

标签：right,TreeNode,val,int,res,二叉,938,Leetcode,left

来源： https://blog.youkuaiyun.com/qq_49666427/article/details/116198312