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106. Construct Binary Tree from Inorder and Postorder Traversal
1 class Solution { 2 public TreeNode buildTree(int[] inorder, int[] postorder) { 3 return helper(postorder.length-1, 0, inorder.length - 1, inorder, p... ...
分类:其他好文   时间:2018-09-20 11:28:23    阅读次数:106
PAT 1138 Postorder Traversal
Suppose that all the keys in a binary tree are distinct positive integers. Given the preorder and inorder traversal sequences, you are supposed to out ...
分类:其他好文   时间:2018-09-15 20:55:10    阅读次数:151
LeetCode 285. Inorder Successor in BST
找中序遍历的后一个节点,那就中序遍历到当前节点后再往后一个,可以用递归,也可以非递归,完全没有用到BST的性质。 也可以充分利用BST的性质,如果p比当前节点小,说明在左子树,res=root;否则去右子树搜索。 ...
分类:其他好文   时间:2018-09-01 12:39:00    阅读次数:144
中序遍历二叉树(js)
leetcode上刷到一题中序遍历一颗二叉树的题,两种方法,使用递归或者栈 原题及解答:https://leetcode.com/problems/binary-tree-inorder-traversal/discuss/164579/recursion-and-stack-solve-the-p ...
分类:Web程序   时间:2018-08-30 02:07:15    阅读次数:220
Construct Binary Tree from Preorder and Inorder Traversal
Construct Binary Tree from Preorder and Inorder Traversal /** * Definition for a binary tree node. * public class TreeNode { * int val; * TreeNode lef... ...
分类:其他好文   时间:2018-08-28 21:13:50    阅读次数:176
【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
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:2018-08-19 13:57:40    阅读次数:107
bst to dll
bst to dll NOT TESTED YET public Node head = null; public Node prev = null; public void inOrder(Node root){ if(root == null){ return; } inOrder(root.l... ...
分类:其他好文   时间:2018-08-17 00:42:51    阅读次数:158
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