leetcode 94: Binary Tree Inorder Traversal
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/** * 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 {public: vector<int> inorderTraversal(TreeNode* root) { vector<int> res; stack<TreeNode*> s; TreeNode* curr=root; while(curr) { s.push(curr); curr=curr->left; } while(!s.empty()) { res.push_back(s.top()->val); curr=s.top()->right; s.pop(); while(curr) { s.push(curr); curr=curr->left; } } return res; }}; 0 0
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