Flatten a binary tree to a fake "linked list" in pre-order traversal. Here we use the right pointer in TreeNode as the next pointer in ListNode. For example,Given 1 / \ 2 5 / \ \ 3 4 6 The flattened tree should look like: 1 \ 2 \ 3 \ 4 \ 5 \ 6 分析: 把所有的树...
Flatten a binary tree to a fake "linked list" in pre-order traversal. Here we use the right pointer in TreeNode as the next pointer in ListNode. Don't forget to mark the left child of each node to null. Or you will get Time Limit Exceeded or Memory Limit Exceeded. Example Example...
https://leetcode.com/problems/flatten-binary-tree-to-linked-list/ 题目: Given a binary tree, flatten it to a linked list in-place. For example, Given 1 / \ 2 5 / \ \ 3 4 6 The flattened tree should look like: 1 \ 2 \ 3 \ 4 \ 5 \ 6 思路: 递归处理每个结点,如果结点左孩...
* Definition for a binary tree node. * type TreeNode struct { * Val int * Left *TreeNode * Right *TreeNode * } */// 解法一 非递归funcflatten(root*TreeNode){list,cur:=[]int{},&TreeNode{}preorder(root,&list)cur=rootfori:=1;i<len(list);i++{cur.Left=nilcur.Right=&TreeNode...
一、原题114. Flatten Binary Tree to Linked List 二、前序遍历 + 展成单链 两步方式 首先通过前序遍历将节点存储到vector 中,然后将vector中的节点展成单链形式。 前序遍历(递归方式实现) /*** Definition for a binary tree node.* struct TreeNode {* int val;* TreeNode *left;* TreeNode *right...
* Definition for a binary tree node. * struct TreeNode { * int val; * TreeNode *left; * TreeNode *right; * TreeNode(int x) : val(x), left(NULL), right(NULL) {} * }; */ class Solution { public: void flatten(TreeNode* root) { ...
Flatten Binary Tree to Linked List 2019-12-21 22:15 −Description Flatten a binary tree to a fake "linked list" in pre-order traversal. Here we use the right pointer in TreeNode as the ... YuriFLAG 0 235 leetcode 341. Flatten Nested List Iterator ...
TreeNode *right; TreeNode() {} TreeNode(int val) : val(val) {} TreeNode(int val, TreeNode *left, TreeNode *right) : val(val), left(left), right(right) {} }; class Solution { public: void flatten(TreeNode* root) { }
2019-12-21 22:15 −Description Flatten a binary tree to a fake "linked list" in pre-order traversal. Here we use the right pointer in TreeNode as the ... YuriFLAG 0 235 leetcode 341. Flatten Nested List Iterator 2019-12-23 23:02 −本题的难点是,这不是一个双重数组,数组里面是...
Given a binary tree, flatten it to a linked list in-place. For example, Given 1 / \ 2 5 / \ \ 3 4 6 The flattened tree should look like: 1 \ 2 \ 3 \ 4 \ 5 \ 6 递归法 思路 相当于一次先序遍历, 将先访问的点存储在数组里, 下一个访问的节点为之前访问的点的右子树 ...