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| /** /** * 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: TreeNode* searchBST(TreeNode* root, int val) { if(!root || root->val == val) { return root; } if(root->val > val) { return searchBST(root->left, val); } else { return searchBST(root->right, val); } } };
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