``` import java.util.ArrayList; import java.util.Arrays; import java.util.List; /** * Source : https://oj.leetcode.com/problems/flatten-binary-tree-to
之前思路中prev是记录linked list最后一个元素。现在我们反过来之后,我们需要记录linked list第一个元素,记作first。 classSolution {public: TreeNode*first=NULL;voidflatten(TreeNode*root) {if(root==NULL)return; flatten(root->right); flatten(root->left); root->right =first; root->left =NULL; first...
*/classSolution{public:voidflatten(TreeNode*root){// Start typing your C/C++ solution below// DO NOT write int main() functionbool flag=true;stack<TreeNode*>t;TreeNode*pre=NULL;if(root){t.push(root);}while(t.size()){TreeNode*cur=t.top();if(flag){if(cur->left&&cur->left!=pre...
[LeetCode]Flatten Binary Tree to Linked List Question Given a binary tree, flatten it to a linked list in-place. For example, Given AI检测代码解析 1 / \ 2 5 / \ \ 3 4 6 1. 2. 3. 4. 5. The flattened tree should look like: AI检测代码解析 1 \ 2 \ 3 \ 4 \ 5 \ 6 1....
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 ...
Can you solve this real interview question? Linked List in Binary Tree - Given a binary tree root and a linked list with head as the first node. Return True if all the elements in the linked list starting from the head correspond to some downward path
Can you solve this real interview question? Convert Sorted List to Binary Search Tree - Given the head of a singly linked list where elements are sorted in ascending order, convert it to a height-balanced binary search tree. Example 1: [https://asse
Balanced Binary Tree 23 -- 6:11 App Leetcode-0114. Flatten Binary Tree to Linked List 89 -- 1:36 App Leetcode-0067. Add Binary 75 -- 3:26 App Leetcode-0102. Binary Tree Level Order Traversal 43 -- 4:43 App Leetcode-0095. Unique Binary Search Trees II 82 -- 6:19 ...
Identify the root of the binary tree using the last element of the postorder list. Find the root's position in the inorder list to determine the left and right subtrees. Recursively construct the left and right subtrees using the respective portions of the inorder and postorder lists. Return...
http://bangbingsyb.blogspot.com/2014/11/leetcode-flatten-binary-tree-to-linked.html ** 总结: pre order tree ** Anyway, Good luck, Richardo! My code: /** * Definition for a binary tree node. * public class TreeNode { * int val; ...