Given a binary tree, return thelevel ordertraversal of its nodes' values. (ie, from left to right, level by level). For example: Given binary tree{3,9,20,#,#,15,7}, 3 / \ 9 20 / \ 15 7 return its level order traversal as: [ [3], [9,20], [15,7] ] ++++++++++++...
题目: Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level). For example:Gi
Binary Tree Level Order Traversal(二叉树的层次遍历) HoneyMoose iSharkFly - 鲨鱼君 来自专栏 · Java 描述给出一棵二叉树,返回其节点值的层次遍历(逐层从左往右访问)样例给一棵二叉树 {3,9,20,#,#,15,7}:3 / \ 9 20 / \ 15 7返回他的分层遍历结果:[ [3], [9,20], [15,7] ]挑战挑战1...
//Binary Tree Level Order Traversal class TreeNodeWithDepth { TreeNode treeNode; int depth; public TreeNodeWithDepth(TreeNode treeNode, int depth) { this.treeNode = treeNode; this.depth = depth; } } public class Solution { //Given a binary tree, return the level order traversal of its...
Given binary tree [3,9,20,null,null,15,7], 3 / \ 9 20 / \ 15 7 1. 2. 3. 4. 5. return its level order traversal as: [ [3], [9,20], [15,7] ] 1. 2. 3. 4. 5. 2. 解法 二叉树层次遍历最通用的方法是借助队列。C语言没有提供队列接口,因此我们自己实现一个吧。
add(c.val); if(c.left!=null) s2.push(c.left); if(c.right!=null) s2.push(c.right); } ans.add(tmp); tmp=new ArrayList<Integer>(); while(!s2.isEmpty()) { c=s2.pop(); tmp.add(c.val); if(c.right!=null)s1.push(c.right); if(c.left!=null)s1.push(c.left); } ...
Implementation of Data Structures in C stackqueuedata-structuresbinary-search-treedata-structruesbreadth-first-searchdepth-first-searchtree-traversalheapsort-algorithmdata-structures-algorithmssingly-linked-listdoubly-linked-listpriority-queuesqueue-algorithmdata-structures-and-algorithmslevel-order-traversaldynamic-...
return its bottom-up level order traversal as: [[15,7],[9,20],[3]] 二叉树的层次遍历,不过需要保持每一层的数据,可以通过vector配合队列实现,实现: classSolution{public:vector<vector<int>>levelOrderBottom(TreeNode*root){vector<vector<int>>vvi;if(root==NULL){returnvvi;}queue<TreeNode*>queue...
Given binary tree{3,9,20,#,#,15,7}, 3 / \ 9 20 / \ 15 7 return its level order traversal as: [ [3], [9,20], [15,7] ] 方法: 做了这么多层次遍历的变形了,终于做到原原本本的层次遍历了。写一下层次遍历的方法吧。使用queue数据结构;设立last指针,始终指向这一层的最后一个节点;设立...
public class BinaryTreeLevelOrder { public static class TreeNode { int data; TreeNode left; TreeNode right; TreeNode(int data) { this.data=data; } } // prints in level order public static void levelOrderTraversal(TreeNode startNode) { Queue<TreeNode> queue=new LinkedList<TreeNode>(); ...