confused what"{1,#,2,3}"means?> read more on how binary tree is serialized on OJ. 思路: preorder用栈两三下就写完了 1vector<int> preorderTraversal(TreeNode *root) {2vector<int>nodes;3if(root == NULL)returnnodes;4stack<TreeNode *>tStack;5tStack.push(root);6while(!tStack.empty()...
Given a binary search tree, print the elements in-order iteratively without using recursion.Note:Before you attempt this problem, you might want to try coding a pre-order traversal iterative solution first, because it is easier. On the other hand, coding a post-order iterative version is a ...
15、课程:树(下).13、练习—Construct Binary Tree from Preorder and Inorder Traversal 1 -- 9:07 App 15、课程:树(下).3、练习—Floor and Ceiling 11 -- 12:45 App 13、课程:哈希表(下).10、作业讲解 3 -- 6:45 App 10、课程:堆栈和队列(上).10、练习—Min stack(一) 2 -- 6:07...
vector<int> inorderTraversal(TreeNode* root) { vector<int> ans; stack<pair<TreeNode*,int>> s; /*will have to maintain if left subtree has been checked for this node or not 0 for not checked 1 for checked*/ if(root){ ...
Collection of various algorithms in mathematics, machine learning, computer science and physics implemented in C++ for educational purposes. - C-Plus-Plus/others/iterative_tree_traversals.cpp at master · TheAlgorithms/C-Plus-Plus
This is the most difficult of all types of iterative tree traversals. You should attempt this problem:Binary Search Tree In-Order Traversal Iterative Solutionbefore this as it is an easier problem. The easiest of all iterative tree traversals isPre-Order Traversal. ...