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[LeetCode] 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:最先想到的就是递归,注...
分类:其他好文   时间:2014-07-10 09:58:40    阅读次数:224
[Leetcode][Tree][Binary Tree Preorder Traversal]
二叉树的前序遍历:root点先被访问,然后是left和right子节点。迭代的版本也相对好写。1、递归版本:时间复杂度O(N),空间复杂度O(N) 1 /** 2 * Definition for binary tree 3 * struct TreeNode { 4 * int va...
分类:其他好文   时间:2014-07-07 20:35:24    阅读次数:158
Problem Binary Tree Preorder Traversal
Problem Description:Given a binary tree, return thepreordertraversal of its nodes' values.Solution: 1 public List preorderTraversal(TreeNode root)...
分类:其他好文   时间:2014-07-07 16:34:34    阅读次数:208
[Leetcode][Tree][Construct Binary Tree from Preorder/Postorder and Inorder Traversal ]
从树的中序遍历+前/后序遍历重建一棵树。必须使用iterator才能过,否则会MLE。1、preorder + inorder第一个版本,使用坐标范围: 1 /** 2 * Definition for binary tree 3 * struct TreeNode { 4 * int...
分类:其他好文   时间:2014-07-07 14:11:10    阅读次数:147
Leetcode 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.此题目有两种解决思路:1)递归...
分类:其他好文   时间:2014-07-03 20:07:01    阅读次数:199
Binary Tree Preorder Traversal
class Solution{public: vectorpreorderTraversal(TreeNode *root) { vectorpreOrder; Traversal(root,preOrder); return preOrder; } stack st;private: voi...
分类:其他好文   时间:2014-07-03 10:10:24    阅读次数:165
Binary Tree Preorder Traversal
题目 Given a binary tree, return the preorder traversal of its nodes' values. For example: Given binary tree {1,#,2,3}, 1 2 / 3 return [1,2,3]. Note: Recu...
分类:其他好文   时间:2014-07-01 07:06:56    阅读次数:177
LeetCode: Binary Tree Preorder Traversal [144]
【题目】 Given a binary tree, return the preorder traversal of its nodes' values. For example: Given binary tree {1,#,2,3}, 1 2 / 3 return [1,2,3]. Note: Recursive solution is trivial, could you do it iteratively? 【题意】 非递归返回先序遍历...
分类:其他好文   时间:2014-06-30 06:21:18    阅读次数:334
leetcode 题解:Binary Tree Preorder Traversal (二叉树的先序遍历)
题目:Given a binary tree, return thepreordertraversal of its nodes' values.For example:Given binary tree{1,#,2,3}, 1 \ 2 / 3return[1,2,3]....
分类:其他好文   时间:2014-06-26 16:03:52    阅读次数:296
LeetCode——Binary Tree Preorder Traversal
Given a binary tree, return the preorder traversal of its nodes' values. For example: Given binary tree {1,#,2,3}, 1 2 / 3 return [1,2,3]. Note: Recursive soluti...
分类:其他好文   时间:2014-06-22 16:37:51    阅读次数:168
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