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Leetcode:Construct Binary Tree from Preorder and Inorder Traversal
题目大意:分别按先序和中序遍历同一个n结点二叉树,得到两个结点数组P和I。要求利用这些结点数组还原二叉树。 这道题考验对二叉树的理解。先说明一些基础的知识: 先序遍历表示当访问一个结点时,先访问结点值,再访问结点的左孩子,最后访问结点的右孩子。 中序遍历表示当访问一个结点时,先访问结点的左孩子,再访 ...
分类:其他好文   时间:2017-11-10 00:37:07    阅读次数:198
606. Construct String from Binary Tree
You need to construct a string consists of parenthesis and integers from a binary tree with the preorder traversing way. The null node needs to be rep ...
分类:其他好文   时间:2017-10-29 11:23:34    阅读次数:172
606. Construct String from Binary Tree
You need to construct a string consists of parenthesis and integers from a binary tree with the preorder traversing way. The null node needs to be rep ...
分类:其他好文   时间:2017-10-25 15:24:36    阅读次数:147
331. Verify Preorder Serialization of a Binary Tree
One way to serialize a binary tree is to use pre-order traversal. When we encounter a non-null node, we record the node's value. If it is a null node, ...
分类:其他好文   时间:2017-10-25 00:52:06    阅读次数:202
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. 给定一个二叉树的先序遍历和 ...
分类:其他好文   时间:2017-10-16 16:41:54    阅读次数:137
144. Binary Tree Preorder Traversal
class Solution { public List preorderTraversal(TreeNode root) { Stack stack=new Stack(); List res=new ArrayList(); while(root!=null||!stack.isEmpty())... ...
分类:其他好文   时间:2017-10-12 10:08:42    阅读次数:181
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. 方法一:迭代 方法二:递归 ...
分类:其他好文   时间:2017-10-10 19:20:19    阅读次数:147
105. Construct Binary Tree from Preorder and Inorder Traversal
public class Solution { public TreeNode buildTree(int[] preorder, int[] inorder) { return buildTree(preorder, 0, preorder.length-1, inorder, 0, inorde... ...
分类:其他好文   时间:2017-09-29 12:42:31    阅读次数:182
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. 解题思路:最经典的递归,已 ...
分类:其他好文   时间:2017-09-28 00:31:25    阅读次数:134
Python实现二叉树的遍历
Python实现二叉树的遍历 classBinaryTree(object): def__init__(self,value=None,left=None,right=None): self.value=value self.left=left self.right=right defrebuild(self,preOrder,inOrder): """ 根据前序列表和中序列表,重建二叉树 :parampreOrder:前序列表 :paraminOrd..
分类:编程语言   时间:2017-09-26 19:44:55    阅读次数:183
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