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Convert Sorted Array to Binary Search Tree——LeetCode
Given an array where elements are sorted in ascending order, convert it to a height balanced BST.题目大意:给定一个升序序列的数组,将其转换为二叉搜索树。解题思路:数组中间元素是根元素,根元素将数组划分为...
分类:其他好文   时间:2015-04-20 22:39:28    阅读次数:207
【leetcode】Convert Sorted Array to Binary Search Tree
Given an array where elements are sorted in ascending order, convert it to a height balanced BST.采用二分递归。 1 class Solution { 2 public: 3 TreeNode *...
分类:其他好文   时间:2015-04-19 21:10:54    阅读次数:173
使用STL来模拟Treap的功能
问题描述我们知道,Treap可以完成节点的动态插入、删除、查询,其每个操作的时间复杂度是O(log n),因为其实现较红黑树更为简单,因此常常用于某些场合,以替换红黑树的实现。Treap的每个节点维护了key, priority。struct Node { int key; int priority; Node (int k, int p): key(k), priority...
分类:其他好文   时间:2015-04-19 18:00:03    阅读次数:264
leetcode || 98、Validate Binary Search Tree
problem: Given a binary tree, determine if it is a valid binary search tree (BST). Assume a BST is defined as follows: The left subtree of a node contains only nodes with keys less th...
分类:其他好文   时间:2015-04-17 18:28:13    阅读次数:142
LeetCode --- 109. Convert Sorted List to Binary Search Tree
题目链接: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. 这道题的要求是将有序链表转化成高度平衡的二叉搜索树(BST)。 1. 利...
分类:其他好文   时间:2015-04-17 18:16:32    阅读次数:165
LeetCode --- 108. Convert Sorted Array to Binary Search Tree
题目链接:Convert Sorted Array to Binary Search Tree Given an array where elements are sorted in ascending order, convert it to a height balanced BST. 这道题的要求是将有序数组转化成高度平衡的二叉搜索树(BST)。 由于数组有序,因此相当于二叉搜索树...
分类:其他好文   时间:2015-04-17 18:15:21    阅读次数:187
leetcode || 99、Recover Binary Search Tree
problem: 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 forwar...
分类:其他好文   时间:2015-04-17 18:14:49    阅读次数:148
leetcode || 96、Unique Binary Search Trees
problem: 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 ...
分类:其他好文   时间:2015-04-17 09:45:12    阅读次数:108
BST迭代器
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 has...
分类:其他好文   时间:2015-04-16 17:45:41    阅读次数:151
leetcode || 95、Unique Binary Search Trees II
problem: Given n, generate all structurally unique BST's (binary search trees) that store values 1...n. For example, Given n = 3, your program should return all 5 unique BST's shown bel...
分类:其他好文   时间:2015-04-16 12:34:36    阅读次数:111
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