Binary Tree Inorder Traversal
发布时间:2020-12-14 04:45:34 所属栏目:大数据 来源:网络整理
导读:Given a binary tree,return the? inorder ?traversal of its nodes‘ values. Example:Input: [ 1 , null , 2 , 3 ] 1 2 / 3 Output: [ 1 , 3 , 2 ] Follow up:?Recursive solution is trivial,could you do it iteratively? code class Solution{ public :
Given a binary tree,return the?inorder?traversal of its nodes‘ values. Example: Input: [1,null,2,3] 1 2 / 3 Output: [1,3,2] Follow up:?Recursive solution is trivial,could you do it iteratively? code class Solution { public: vector<int> inorderTraversal(TreeNode* root) { if(root==nullptr) return {}; vector<int> res; stack<TreeNode *> stack; TreeNode *tmp=root; while(tmp!=nullptr||!stack.empty()) { while(tmp!=nullptr) { stack.push(tmp); tmp=tmp->left; } if(!stack.empty()) { tmp=stack.top(); res.emplace_back(tmp->val); stack.pop(); tmp=tmp->right; } } return res; } }; (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |