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Leetcode 106 Construct Binary Tree from Inorder and Postorder Traversal

二叉树 binary duplicates traversal tree

Given inorder and postorder traversal of a tree, construct the binary tree. Note: You may assume that duplicates do not exist in the tree. 中序和后序还原二叉树。直接在上一题的代码上做一点小修改就行了。 /** * Definition for a binary tree node. * struct TreeNode { * int val;

2018-01-12

6040

Leetcode 100 Same Tree

二叉树 binary function nodes

Given two binary trees, write a function to check if they are equal or not. Two binary trees are considered equal if they are structurally identical and the nodes have the same value. 判断两棵二叉树是否一样。简单，不多说了。 /** * Definition for a binary tree node. * s

2018-01-12

4620

Leetcode 114 Flatten Binary Tree to Linked List

二叉树 binary flatten list tree

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 \

2018-01-12

6850

Leetcode 199 Binary Tree Right Side View

Given a binary tree, imagine yourself standing on the right side of it, return the values of the nodes you can see ordered from top to bottom. For example: Given the following binary tree, 1 <--- / \ 2 3 <--- \ \ 5

2018-01-12

4540

Leetcode 222. Count Complete Tree Nodes

二叉树 node.js

Given a complete binary tree, count the number of nodes. Definition of a complete binary tree from Wikipedia: In a complete binary tree every level, except possibly the last, is completely filled, and all nodes in the last level are as far left as possi

2018-01-12

6570

Leetcode 236. Lowest Common Ancestor of a Binary Tree

node.js 二叉树

Given a binary tree, find the lowest common ancestor (LCA) of two given nodes in the tree. According to the definition of LCA on Wikipedia: “The lowest common ancestor is defined between two nodes v and w as the lowest node in T that has both v and w as

2018-01-12

5570

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