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[C++]LeetCode: 52 Climbing Stairs
题目: You are climbing a stair case. It takes n steps to reach to the top. Each time you can either climb 1 or 2 steps. In how many distinct ways can you climb to the top? 思路解析: 无法一下子判断是 Fib...
分类:编程语言   时间:2014-12-23 15:39:32    阅读次数:309
MongoDB学习笔记-05 聚合
MongoDB除了基本查询功能之外,还有强大的聚合工具,其中包括:count()、distinct()、group()、mapreduce. 计数函数count count是最简单的聚合工具,用于返回文档的数量: >db.user.count() // 返回集合user的个数 传递查询文档时,则计算...
分类:数据库   时间:2014-12-22 21:06:31    阅读次数:183
Subsets
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 no...
分类:其他好文   时间:2014-12-22 17:55:10    阅读次数:220
为了去重复,写了一个通用的比较容器类,可以用在需要比较的地方,且支持Lamda表达式
为了去重复,写了一个通用的比较容器类,可以用在需要比较的地方,且支持Lamda表达式 dataTable.AsEnumerable().Distinct(new DataComparer((x, y) => return (x[1] == y[1] && x[2] ==y[2]))).CopyT...
分类:其他好文   时间:2014-12-22 17:38:43    阅读次数:122
SQL 查询存储过程
select distinct name from syscomments a,sysobjects b where a.id=b.id and b.xtype='p' --and text like '%my_sp%'
分类:数据库   时间:2014-12-22 12:27:59    阅读次数:180
[leetcode]N-Queens II
问题描述: Follow up for N-Queens problem. Now, instead outputting board configurations, return the total number of distinct solutions. (N-Queens problem can see here ) 基本思路: 可参照N-Queens问题,按...
分类:其他好文   时间:2014-12-21 22:12:49    阅读次数:157
[leetcode]N-Queens
问题描述: The n-queens puzzle is the problem of placing n queens on an n×n chessboard such that no two queens attack each other. Given an integer n, return all distinct solutions to the n-queens p...
分类:其他好文   时间:2014-12-21 22:12:21    阅读次数:159
AVG
AVG([ DISTINCT | ALL ] expr) [ OVER(analytic_clause) ]SELECT MANAGER_ID, LAST_NAME, HIRE_DATE, SALARY, AVG(SALARY) OVER(PARTITION BY MANAGER_ID ORDER ...
分类:其他好文   时间:2014-12-21 16:28:23    阅读次数:165
COUNT
COUNT({ * | [ DISTINCT | ALL ] expr }) [ OVER (analytic_clause) ]SELECT ENAME, E.HIREDATE, COUNT(EMPNO) OVER(ORDER BY HIREDATE RANGE BETWEEN 30 PRE...
分类:其他好文   时间:2014-12-21 16:27:12    阅读次数:225
NYOJ 233 Sort it【冒泡排序】
求解交换次数,用冒泡刚好 Sort it 时间限制:1000 ms  |  内存限制:65535 KB 难度:2 描述You want to processe a sequence of n distinct integers by swapping two adjacent sequence elements until the sequence ...
分类:编程语言   时间:2014-12-21 14:02:44    阅读次数:155
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