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Leetcode: Subsets
题目: Given a set of distinct integers, S, return all possible subsets.Note:Elements in a subset must be in non-descending order. The solution set must not contain duplicate subsets. For example, If S...
分类:其他好文   时间:2015-04-21 00:26:35    阅读次数:134
T-SQL备忘(4):分页
set statistics io on set statistics time on --SQL Server 2012分页方式 select * from Production.Product order by ProductID offset 20 row fetch next 10 rows...
分类:数据库   时间:2015-04-21 00:18:23    阅读次数:171
LeetCode - Rank Scores
对分数排序 参考了网上的答案 而且如果不Order by 有一个BUG就是 如果表为空则什么都不输出包括null才是正确的。 # Write your MySQL query statement belowselect s.Score, count(rank.Score) as Rankfrom ....
分类:其他好文   时间:2015-04-21 00:06:10    阅读次数:135
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
SQLSever 第二堂课,主要学习内容为top查询前多少行,distinct去重,order by排序,group by分组,最重要子查询
create database xueshengdrop database xushenguse xueshenggocreate table xueshengxinxi(code int primary key identity(1,1)not null,name varchar(50) not ...
分类:数据库   时间:2015-04-20 16:21:22    阅读次数:173
LeetCode Permutation Sequence
The set [1,2,3,…,n] contains a total of n! unique permutations.By listing and labeling all of the permutations in order,We get the following sequence (ie, for n = 3):"123""132""213""231""312""321"Give...
分类:其他好文   时间:2015-04-20 15:00:36    阅读次数:116
LeetCode93——Restore IP Addresses
Given a string containing only digits, restore it by returning all possible valid IP address combinations. For example: Given "25525511135", return ["255.255.11.135", "255.255.111.35"]. (Order does ...
分类:其他好文   时间:2015-04-20 14:53:39    阅读次数:95
leetcode || 102、Binary Tree Level Order Traversal
problem: Given a binary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level). For example: Given binary tree {3,9,20,#,#,15,7}, 3...
分类:其他好文   时间:2015-04-20 11:14:41    阅读次数:131
【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
Partition List -- leetcod
Given a linked list and a value x, partition it such that all nodes less than x come before nodes greater than or equal to x. You should preserve the original relative order of the nodes in each of...
分类:其他好文   时间:2015-04-19 17:56:02    阅读次数:131
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