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【PAT】1020 Tree Traversals (25)(25 分)
Suppose that all the keys in a binary tree are distinct positive integers. Given the postorder and inorder traversal sequences, you are supposed to ou ...
分类:其他好文   时间:2018-08-24 21:46:35    阅读次数:197
106. Construct Binary Tree from Inorder and Postorder Traversal根据后中序数组恢复出原来的树
[抄题]: 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 ex ...
分类:编程语言   时间:2018-08-24 00:39:40    阅读次数:136
pat甲级1020中序后序求层序
Suppose that all the keys in a binary tree are distinct positive integers. Given the postorder and inorder traversal sequences, you are supposed to ou ...
分类:其他好文   时间:2018-08-19 15:46:04    阅读次数:139
LeetCode 145. 二叉树的后序遍历(Binary Tree Postorder Traversal)
题目描述 给定一个二叉树,返回它的 后序 遍历。 示例: 输入: [1,null,2,3] 1 \ 2 / 3 输出: [3,2,1] 进阶: 递归算法很简单,你可以通过迭代算法完成吗? 给定一个二叉树,返回它的 后序 遍历。 示例: 进阶: 递归算法很简单,你可以通过迭代算法完成吗? 解题思路 后 ...
分类:其他好文   时间:2018-08-17 17:49:08    阅读次数:172
【leetcode】145. Binary Tree Postorder Traversal
题目如下: 解题思路:凑数题+3,搞不懂为什么本题的难度是Hard,而【leetcode】590. N-ary Tree Postorder Traversal是Medium。 代码如下: ...
分类:其他好文   时间:2018-08-01 12:02:10    阅读次数:159
【leetcode】590. N-ary Tree Postorder Traversal
题目如下: 解题思路:凑数题+2,做完先序做后序。凑数博+2。 代码如下: ...
分类:其他好文   时间:2018-07-31 22:01:30    阅读次数:178
[LeetCode] 590. N-ary Tree Postorder Traversal_Easy
Given an n-ary tree, return the postorder traversal of its nodes' values. For example, given a 3-ary tree: Return its postorder traversal as: [5,6,3,2 ...
分类:其他好文   时间:2018-07-22 11:29:49    阅读次数:172
1119 Pre- and Post-order Traversals(30 分)
Suppose that all the keys in a binary tree are distinct positive integers. A unique binary tree can be determined by a given pair of postorder and ino ...
分类:其他好文   时间:2018-07-06 12:15:29    阅读次数:181
72 中序遍历和后序遍历树构造二叉树
原题网址:https://www.lintcode.com/problem/construct-binary-tree-from-inorder-and-postorder-traversal/description 描述 根据中序遍历和后序遍历树构造二叉树 描述 描述 根据中序遍历和后序遍历树构造 ...
分类:其他好文   时间:2018-07-06 01:40:16    阅读次数:206
PAT 1020 Tree Traversals (25)
Suppose that all the keys in a binary tree are distinct positive integers. Given the postorder and inorder traversal sequences, you are supposed to ou ...
分类:其他好文   时间:2018-06-22 17:47:42    阅读次数:164
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