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1099. Build A Binary Search Tree (30)
题目要求: A Binary Search Tree (BST) is recursively defined as a binary tree which has the following properties: The left subtree of a node contains only nodes with keys less than the node's key....
分类:其他好文   时间:2015-03-31 14:46:43    阅读次数:168
Treap
Treap         Treap是一种动态平衡的BST(Binary Search Tree),它每个节点拥有键值和优先级两种属性。对于键值而言,它是一颗排序二叉树。对于优先级而言,这棵树是堆(优先级最高的是根节点)。可以证明Treap中插入,删除和查找的期望时间复杂度均为O(logn)。关于Treap的更多介绍,可见刘汝佳《训练指南》P230。 一般我们用Treap就是用来替代平衡二叉...
分类:其他好文   时间:2015-03-31 14:40:38    阅读次数:226
Recover Binary Search Tree
Two elements of a binary search tree (BST) are swapped by mistake. Recover the tree without changing its structure. #include #include #include using namespace std; struct TreeNode { int val;...
分类:其他好文   时间:2015-03-30 11:24:41    阅读次数:121
Unique Binary Search Tree -- LeetCode
题目: Given n, how many structurally unique BST's (binary search trees) that store values 1...n? For example, Given n = 3, there are a total of 5 unique BST's. 1 3 3 2 ...
分类:其他好文   时间:2015-03-29 15:11:19    阅读次数:106
109【LeetCode】Convert Sorted List to Binary Search Tree
Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST. {CSDN:CODE:630443}...
分类:其他好文   时间:2015-03-29 07:08:21    阅读次数:128
Leetcode: Binary Search Tree Iterator
题目: Implement an iterator over a binary search tree (BST). Your iterator will be initialized with the root node of a BST.Calling next() will return the next smallest number in the BST.Note: next() and...
分类:其他好文   时间:2015-03-29 00:38:50    阅读次数:201
Q7: Unique Binary Search Trees
问题描述:Givenn, how many structurally uniqueBST's(binary search trees) that store values 1...n?For example,Givenn= 3, there are a total of 5 unique BST's...
分类:其他好文   时间:2015-03-21 22:49:36    阅读次数:156
LeetCoode—**Convert Sorted List to Binary Search Tree 将单链表表示为平衡二叉
Given a singly linked list where elements are sorted in ascending order, convert it to a height balanced BST. 我想如果只是表示成二叉树,没有什么难度,但是如果是表示为平衡二叉树那么可能就有难度了 要求左右子树的高度是均衡的 先给出自己的解法,很low,就是现将节点都保存在vector...
分类:其他好文   时间:2015-03-21 17:10:11    阅读次数:158
【LeetCode】Recover Binary Search Tree 解题报告
【题目】 Two elements of a binary search tree (BST) are swapped by mistake. Recover the tree without changing its structure. Note: A solution using O(n) space is pretty straight forward. Could...
分类:其他好文   时间:2015-03-21 12:42:54    阅读次数:129
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