Thus when coming out the HashMap, sort the values first based on row, then based on value. Time Complexity: O(n + logn*loglogn). n is the number of nodes. Thus the longest list is the height of tree m = logn. sort takes O(mlogm). Space: O(n). AC Java: 1/**2* Definition...
* TreeNode(int x) : val(x), left(NULL), right(NULL) {} * }; */classSolution{public:voidtraversal(TreeNode* root,intx,inty, vector<PPR>& res){if(root !=NULL){ res.push_back({{x, y}, root->val});traversal(root->left, x-1, y+1, res);traversal(root->right, x+1, y+...
Problem 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] 3 /\ / \ 9 ...
[LeetCode] 314. Binary Tree Vertical Order Traversal 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...
2019-12-10 07:55 − 原题链接在这里:https://leetcode.com/problems/vertical-order-traversal-of-a-binary-tree/ 题目: Given a binary tree, return the vertical order traversa... Dylan_Java_NYC 0 931 【Flutter】布局类组件之对齐和相对定位 2019-12-20 16:52 − ## 前言如果只想简单的...
2019-12-10 07:55 − 原题链接在这里:https://leetcode.com/problems/vertical-order-traversal-of-a-binary-tree/ 题目: Given a binary tree, return the vertical order traversa... Dylan_Java_NYC 0 931 【Flutter】布局类组件之对齐和相对定位 2019-12-20 16:52 − ## 前言如果只想简单的...
1//Print a Binary Tree in Vertical Order2staticintmin;3staticintmax;4staticHashMap<Integer,ArrayList>map;56publicstaticvoidgenerate(TreeNode root, Integer dis){7if(root ==null)return;8else{9if(map.containsKey(dis)) map.get(dis).add(root.val);10else{11ArrayList<Integer> tmp =newArrayList<...
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: Given binary tree [3,9,20,null,null,15,7], 3 /\ / \ 9...
LeetCode.314. 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...
return its vertical order traversal as: [ [4], [9], [3,5,2], [20], [7] ] 二叉树的垂直遍历。 解法:如果一个node的column是 i,那么它的左子树column就是i - 1,右子树column就是i + 1。建立一个TreeColumnNode,包含一个TreeNode,以及一个column value,然后用level order traversal进行计算,并...