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Leetcode 106.从中序与后序遍历序列构造二叉树
从中序与后序遍历序列构造二叉树 根据一棵树的中序遍历与后序遍历构造二叉树。 注意:你可以假设树中没有重复的元素。 例如,给出 中序遍历 inorder = [9,3,15,20,7] 后序遍历 postorder = [9,15,7,20,3] 返回如下的二叉树: 3 / \ 9 20 / \ 15 ...
分类:其他好文   时间:2018-12-23 11:27:46    阅读次数:262
leetcode 94. Binary Tree Inorder Traversal
求树的中序遍历,递归很简单,循环我用栈来实现,再用hashmap或者改变变量的值来记录一下。递归0ms,beats 100%,循环:改变值,1ms,beats 59.19%,用hashmap 2ms= = 只放循环的吧。 ...
分类:其他好文   时间:2018-12-14 00:51:53    阅读次数:217
#Leetcode# 94. Binary Tree Inorder Traversal
https://leetcode.com/problems/binary-tree-inorder-traversal/ Given a binary tree, return the inorder traversal of its nodes' values. Example: 代码: 二叉树 ...
分类:其他好文   时间:2018-12-10 20:50:04    阅读次数:179
Construct Binary Tree from Preorder and Inorder Traversal
Given preorder and inorder traversal of a tree, construct the binary tree. Note:You may assume that duplicates do not exist in the tree. For example, ...
分类:其他好文   时间:2018-11-22 21:08:43    阅读次数:129
94. Binary Tree Inorder Traversal
Given a binary tree, return the inorder traversal of its nodes' values. Example: Follow up: Recursive solution is trivial, could you do it iteratively ...
分类:其他好文   时间:2018-11-11 23:27:12    阅读次数:163
105.Construct Binary Tree from Preorder and Inorder Traversal
Given preorder and inorder traversal of a tree, construct the binary tree. Note: You may assume that duplicates do not exist in the tree. For example, ...
分类:其他好文   时间:2018-11-07 14:04:34    阅读次数:200
[LeetCode] 106. Construct Binary Tree from Inorder and Postorder Traversal 由中序和后序遍历建立二叉树
Given inorder and postorder traversal of a tree, construct the binary tree. Note:You may assume that duplicates do not exist in the tree. For example, ...
分类:其他好文   时间:2018-10-03 23:38:19    阅读次数:154
[LeetCode] 105. Construct Binary Tree from Preorder and Inorder Traversal 由先序和中序遍历建立二叉树
Given preorder and inorder traversal of a tree, construct the binary tree. Note:You may assume that duplicates do not exist in the tree. For example, ...
分类:其他好文   时间:2018-10-03 21:54:52    阅读次数:120
105. Construct Binary Tree from Preorder and Inorder Traversal
一、题目 1、审题 2、分析 给出一个数值不重复的二叉树的先序、中序遍历的遍历顺序,求该二叉树的原始结构。 二、解答 1、思路: 分析二叉树的先序、中序遍历特点如下: ①、先序(preOrder): 根 --> 左 --> 右; ②、中序(inOrder): 左--> 根 --> 右; ③、先序的第 ...
分类:其他好文   时间:2018-09-30 23:20:00    阅读次数:163
03-树3 Tree Traversals Again (25 分)
An inorder binary tree traversal can be implemented in a non-recursive way with a stack. For example, suppose that when a 6-node binary tree (with the ...
分类:其他好文   时间:2018-09-29 14:26:38    阅读次数:326
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