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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. class Solution { private: TreeNode *root; v...
分类:其他好文   时间:2015-01-02 09:46:36    阅读次数:107
4. Binary Tree Preorder Traversal
Given a binary tree, return thepreordertraversal of its nodes' values.For example:Given binary tree{1,#,2,3}, 1 \ 2 / 3return[1,2,3].Not...
分类:其他好文   时间:2014-12-30 20:33:18    阅读次数:182
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. 给出树的中序和先序遍历 要求返回树  中序结果{1,2,5,4,3,6} 先序{4,2,1,5,3,6}根据先...
分类:其他好文   时间:2014-12-30 15:22:45    阅读次数:176
Construct Binary Tree from Inorder and PreOrder Traversal
preOrder: (root) LLL RRRRinOrder: LLL (root) RRRRinOrder: LLL RRRR (root)根据preOrder/postOrder 可以知道root(一头一尾); 然后找到root在inorder中对应的位置(index)index左边即为Le...
分类:其他好文   时间:2014-12-30 14:50:20    阅读次数:202
[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:2014-12-29 21:34:20    阅读次数:196
Construct Binary Tree from Preorder and Inorder Traversal
Given preorder and inorder traversal of a tree, construct the binary tree.这道题是要根据先序遍历和中序遍历构造出一棵二叉树,这道题和上一题是一样的。上一题不过是通过后序遍历和中序遍历构造一棵二叉树。只要将代码稍稍修改即可 1 ...
分类:其他好文   时间:2014-12-29 21:21:10    阅读次数:377
Leetcode: Binary Tree Preorder Traversal
这道题一共有三道解法:其中第二种解法,我参考了迭代器的写法,写了一个迭代器的类。重载了前++和—>操作符,但是这个解法会造成内存的超限,很奇怪,解法1:递归解法: 1 class Solution { 2 public: 3 vector result; 4 vector preor...
分类:其他好文   时间:2014-12-20 12:57:22    阅读次数:198
Construct Binary Tree From Inorder and Preorder/Postorder Traversal
map mapIndex;void mapToIndex(int inorder[], int n){ for (int i = 0; i ::value_type(inorder[i], i); }}Node* buildInorderPreorder(int in[], int pr...
分类:其他好文   时间:2014-12-20 11:40:02    阅读次数:118
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:2014-12-19 12:14:35    阅读次数:118
leetcode Binary Tree Preorder Traversal
实现前序遍历。可参见中序遍历Binary Tree Inorder Traversal递归:/** * Definition for binary tree * struct TreeNode { * int val; * TreeNode *left; * TreeNode...
分类:其他好文   时间:2014-12-13 23:12:09    阅读次数:189
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