* 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+...
root)10returnrnt;1112vector<vector<vector<int>>> v(1000,vector<vector<int>>(1000));13queue<pair<pair<int,int>,TreeNode*>>q;14q.push({{0,501},root});1516while(!q.empty())17{18auto a =q.front();19q.pop();20v[a.first.first][...
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] 3 /\ / \ 9 20 /\ ...
The number of nodes in the tree is in the range[0, 100]. -100 <= Node.val <= 100 二叉树的垂直遍历。 例子应该解释的很清楚了,思路是BFS层序遍历,需要用到一个index变量记录子节点相对于根节点的偏移量,同时需要用hashmap<偏移量,相同偏移量的节点组成的list>把相同偏移量的节点放在一起。
LeetCode 987. Vertical Order Traversal of a Binary Tree 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...
LeetCode 987. Vertical Order Traversal of a Binary Tree 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 0 929 【Flutter】布局类组件之对齐和...
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 1. 2.
Vertical Traversal Tree 这题也是一点想法都没有,平常做的traversal再怎么样也是一个Horizontal的, vertical的话,怎么知道谁和你是一列的。。。 答案搬运工。。【看完答案我真心觉得这题是Hard level】 答案采用了BFS的方式,最厉害的地方就是他做了一个cols的queue。然后结合了一下HasMap. 同一个col的, which ...
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...