更为简洁非递归解法 具体程序如下: 1vector<int> preorderTraversal(TreeNode*root) {2vector<int>rVec;3if(!root)4returnrVec;56stack<TreeNode *>st;7st.push(root);8while(!st.empty())9{10TreeNode *tree =st.top();11rVec.push_back(tree->val);12st.pop();13if(tree->right)14st.push(...
LeetCode: 889. Construct Binary Tree from Preorder and Postorder Traversal 题目描述 Return any binary tree that matches the given preorder and postorder traversals. Values in the traversals pre and post are distinct positive integers. Example 1: Input: pre =...
就可以重建出原始的二叉树,而且正好都在 LeetCode 中有出现,其他两道分别是 [Construct Binary Tree from Inorder and Postorder Traversal](https://www.cnblogs.com/grandyang/p/4296193.html) 和 [Construct Binary Tree from Preorder and Inorder Traversal](https://www.cnblogs.com/grandyang/p/4296500...
1vector<int> preorderTraversal(TreeNode*root) {2vector<int>rVec;3stack<TreeNode *>st;4TreeNode *tree =root;5while(tree || !st.empty())6{7if(tree)8{9st.push(tree);10rVec.push_back(tree->val);11tree = tree->left;12}13else14{15tree =st.top();16st.pop();17tree = tree-...
B. S. Kim, I. J. Shim, M. T. Lim, and Y. J. Kim, "Combined preorder and postorder traversal algorithm for the analysis of singular systems by Haar wavelets," Mathematical Problems in Engineering, vol. 2008, Article ID 323080, 16 pages, 2008....
889. Construct Binary Tree from Preorder and Postorder Traversal,程序员大本营,技术文章内容聚合第一站。
We are using recursion for these examples, you can also implement the same traversal using while loop. 2.3. Postorder Binary Tree Traversal The post-order binary tree traversal, we traverse the left sub tree, the right sub-tree and finally visit the root node.Here is the algorithm for the ...
Runtime: 32 ms, faster than 89.16% of Python3 online submissions for Binary Tree Preorder Traversal. Memory Usage: 13.1 MB, less than 83.48% of Python3 online submissions for Binary Tree Preorder Traversal. Description (Postorder, 145): ...
同Construct Binary Tree from Inorder and Postorder Traversal(Python版) # Definition for a binary tree node. # class TreeNode: # def __init__(self, val=0, left=None, right=None): # self.val = val # self.left = left # self.right = right class Solution: def buildTree(self, pre...
889. Construct Binary Tree from Preorder and Postorder Traversal 根据前序和后序重建二叉树,不会,哭:),discussion /** * Definition for a binary tree node. * struct TreeNode { * int val; * TreeNode *left; * TreeN... 栈和递归的关系 144:Binary Tree Preorder Traversal ...