这个遍历方式也是LeetCode中 Binary Tree Inorder Traversal 一题的解法之一。 附题目,Binary Tree Inorder Traversal Given a binary tree, return theinordertraversal of its nodes' values. For example: Given binary tree{1,#,2,3}, 1 \ 2
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 challenge. See my post:Binary Tree Post-Order Traversal Iterative Solutionfor more details and an ...
Preorder traversal starts printing from the root node and then goes into the left and right subtrees, respectively, while postorder traversal visits the root node in the end. #include<iostream>#include<vector>using std::cout;using std::endl;using std::string;using std::vector;structTreeNode{...
class BSTIterator { Queue<Integer> queue = new LinkedList<>(); public BSTIterator(TreeNode root) { inorderTraversal(root); } private void inorderTraversal(TreeNode root) { if (root == null) { return; } inorderTraversal(root.left); queue.offer(root.val); inorderTraversal(root.right);...
void in_order(TreeNode* root) { if (!root)return; in_order(root->left); res.push_back(root->val); in_order(root->right); } vector<int> inorderTraversal(TreeNode* root) { in_order(root); return res; } }; 1. 2. 3.
:type root: TreeNode :rtype: List[int] """ if not root: return [] else: return self.inorderTraversal(root.left) + [root.val] + self.inorderTraversal(root.right) 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 迭代 和前序后序不同,需要遵循上面的思路 ...
Post - Order Traversal Consider the following binary tree... 1. In - Order Traversal ( leftChild - root - rightChild ) In In-Order traversal, the root node is visited between the left child and right child. In this traversal, the left child node is visited first, then the root node ...
Preorder traversal Inorder traversal Postorder traversalEssentially, all three traversals work in roughly the same manner. They start at the root and visit that node and its children. The difference among these three traversal methods is the order with which they visit the node itself versus ...
The tree is known as a Binary Search Tree or BST. Traversing the tree There are mainlythreetypes of tree traversals. Pre-order traversal In this traversal technique the traversal order is root-left-right i.e. Process data of root node ...
Given a binary tree, return theinordertraversal 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? 二叉树的中序遍历顺序为左-根-右,可以有递归和非递归来解,其中非递归解法又分为两种,...