leetCode #94 Binary Tree Inorder Traversal
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题目:二叉树中序遍历
分析:也是递归
答案:
/** * 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 {private: vector<int> res;public: vector<int> inorderTraversal(TreeNode* root) { dfs(root); return res; } void dfs(TreeNode* root){ if (root!=NULL){ dfs(root->left); res.push_back(root->val); dfs(root->right); } } };
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