console.log(fullTree); 深度优先 functiondepthFirstTraversal(root) {if(!root) {return; } let explored=[];//create a stack and add the root to itconst discovered =newStack(); discovered.push(root);while(discovered.length > 0) {//remove the last item from our list of discovered nodescons...
The vertical order traversal of a binary tree is a list of top-to-bottom orderings for each column index starting from the leftmost column and ending on the rightmost column. There may be multiple nodes in the same row and same column. In such a case, sort these nodes by their values....
Map<Integer, List<Integer>> map = new HashMap(); public List<List<Integer>> verticalTraversal(TreeNode root) { List<List<Integer>> res = new ArrayList(); if(root==null) return res; // 借助了队列qt和qi,代替了递归//树的所有节点 Queue<TreeNode> qt = new LinkedList(); //节点坐标,...
If we are given a binary tree and we need to perform a vertical order traversal, that means we will be processing the nodes of the binary tree from left to right. Suppose we have a tree such as the one given below. If we traverse the tree in vertical order and print the nodes then...
题目描述英文版描述Given the root of a binary tree, return the level order traversal of its nodes' values. (i.e., from left to right, level by level). Example 1: Input: root = [3,9,20,null,null,1…
Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level). For example: Given binary tree [3,9,20,null,null,15,7], 代码语言:javascript 代码运行次数:0 运行 AI代码解释 ...
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从大的层面讲,Binary Tree 可以用DFS和BFS。 对于BFS,我们需要iterative with queue。 对于DFS,Binary Tree 有三种traversal的方式: ** Inorder Traversal: left -> root -> right ** Preoder Traversal: root -> left -> right ** Postoder Traveral: left -> right -> root ...
a) Make current as right child of the rightmost node in current's left subtree b) Go to this left child, i.e., current = current->left /** * Definition for a binary tree node. * public class TreeNode { * int val; * TreeNode left; ...
[Leetcode][python]Binary Tree Preorder Traversal/二叉树的前序遍历,题目大意二叉树前序遍历挑战:迭代解题解题思路递归简单