leetcode:Binary Tree Inorder Traversal
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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:vector<int> inorderTraversal(TreeNode *root) { vector<int> inorder; stack<TreeNode *> tree; TreeNode *p=root; if(p==NULL) return inorder; while(p||!tree.empty()) { if(p) { tree.push(p); p=p->left; } else { p=tree.top(); inorder.push_back(p->val); tree.pop(); p=p->right; } } return inorder;}};
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