The topmost node of a binary tree is the root node.The level of a node is the number of edges along the unique path between it and the root node.Therefore, the root node has a level of 0. If it has children, both of them have a level of 1. The level of a binary tree is the...
The number of nodes in the tree is in the range [0, 2000]. -1000 <= Node.val <= 1000 英文版地址 中文版描述 给你二叉树的根节点 root ,返回其节点值的 层序遍历。 (即逐层地,从左到右访问所有节点)。 示例1: 输入:root = [3,9,20,null,null,15,7] 输出:[[3],[9,20],[15,7]]...
The number of nodes in the tree is in the range[0, 2000]. -1000 <= Node.val <= 1000 从底部层序遍历其实还是从顶部开始遍历,只不过最后存储的方式有所改变,可以参见博主之前的博文Binary Tree Level Order Traversal, 参见代码如下: 解法一: classSolution {public: vector<vector<int> > levelOrderBot...
push(root); 28 tree_queue.push(NULL); 29 int nLevelCount = 1; 30 while (true) { 31 TreeNode *pTemp = tree_queue.front(); 32 tree_queue.pop(); 33 if (pTemp == NULL) { 34 if (nLevelCount%2 == 0) { //if the num of level is odd, swap the ivec; 35 Swap(ivec); ...
1/**2* Definition for a binary tree node.3* struct TreeNode {4* int val;5* TreeNode *left;6* TreeNode *right;7* TreeNode(int x) : val(x), left(NULL), right(NULL) {}8* };9*/10classSolution {11public:12vector<vector<int>> levelOrder(TreeNode*root) {13vector<vector<int>...
(ans,0,root)returnans}funvisitLevel(ans:MutableList<MutableList<Int>>,level:Int,node:TreeNode?){if(null==node)return// level 从0 (root) 开始,此时 ans.size = 0; 每层的值存在 levelList 中. 这地方的代码非常巧妙.if(ans.size==level){val levelList=mutableListOf<Int>()ans.add(levelList...
* Definition for a binary tree node. * type TreeNode struct { * Val int * Left *TreeNode * Right *TreeNode * } */funclevelOrderBottom(root*TreeNode)[][]int{tmp:=levelOrder(root)res:=[][]int{}fori:=len(tmp)-1;i>=0;i--{res=append(res,tmp[i])}returnres}funclevelOrder(roo...
For each completely specified binary tree in the input file, the level order traversal of that tree should be printed. If a tree is not completely specified, i.e., some node in the tree is NOT given a value or a node is given a value more than once, then the string “not complete...
LevelDB. Authored by Rod Vagg,levelupexposed the features of LevelDB in a Node.js-friendly way. It had streams, binary support, encodings... all the goodies. Later on, the binding was moved toleveldown, so that other stores could be swapped in while retaining the friendly API oflevelup...
Back in 2012, levelup offered a Node.js binding for Google's LevelDB. Authored by Rod Vagg, levelup exposed the features of LevelDB in a Node.js-friendly way. It had streams, binary support, encodings... all the goodies. Later on, the binding was moved to leveldown, so that other ...