* Definition for a binary tree node. * struct TreeNode { * int val; * TreeNode *left; * TreeNode *right; * TreeNode(int x) : val(x), left(NULL), right(NULL) {} * }; */ classSolution { public: vector<vector<int>> verticalOrder(TreeNode* root) { unordered_map<int, vector<...
面经:print the top view of a binary tree 实现:Time O(nlogn) BFS-n, map-logn Space O(n) classSolution {public: vector<vector<int>> verticalOrder(TreeNode*root) { vector<vector<int>>res;if(!root)returnres; map<int, vector<int>>m; queue<pair<TreeNode*,int>>q; q.push({root,0}...
class Solution { int min=0, max=0; // 垂直方向 每列的结果 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...
Given therootof a binary tree, returnthe vertical order traversal of its nodes' values. (i.e., from top to bottom, column by column). If two nodes are in the same row and column, the order should be from left to right. Example 1: Input: root = [3,9,20,null,null,15,7] Outpu...
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...
Vertical order traversal means that we find the different vertical lines in the binary tree, then print the nodes on these from left to right, the nodes on a vertical line are printed from to bottom. How do you vertically print a binary tree?
Binary Tree Vertical Order Traversal https://leetcode.com/problems/binary-tree-vertical-order-traversal/ 这道题让我们竖直的遍历树,和按层遍历非常相似。我第一次做的时候,使用的是递归的形式,发现顺序会出错。 因此还是要借助按层遍历的思路,将树逐层的加入一个队列,然后再取出来进行处理。 遍历的时候,...
Given a binary tree, return the vertical order traversal of its nodes' values. (ie, from top to bottom, column by column). If two nodes are in the same row and column, the order should be from left to right. Examples 1: Input: [3,9,20,null,null,15,7] ...
Given a binary tree, print it vertically. The following example illustrates vertical order traversal. 1 / \ 2 3 / \ / \ 4 5 6 7 \ \ 8 9 The output of print this tree vertically will be: 4 2 1 5 6 3 8 7 9 from geeksforgeeks: http://www.geeksforgeeks.org/print-binary-tree...
https://leetcode.com/discuss/73113/using-hashmap-bfs-java-solution https://leetcode.com/discuss/74022/hashmap-bfs-solution-in-java https://leetcode.com/discuss/73893/java-level-order-traversal-solution http://algorithms.tutorialhorizon.com/print-the-binary-tree-in-vertical-order-path/...