题目描述：
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:斐波那契数列的应用。f(n)=f...
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其他好文 时间：
2014-10-28 12:13:05
阅读次数：
211
高级查询在数据库中用得是最频繁的，也是应用最广泛的。Ø 基本常用查询--selectselect * from student; --all 查询所有select all sex from student; --distinct 过滤重复select distinct sex from studen...
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数据库 时间：
2014-10-28 00:27:22
阅读次数：
284
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 co...
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其他好文 时间：
2014-10-28 00:24:24
阅读次数：
240
这篇文章主要介绍了C#中datatable去重的方法,通过两种不同的方法对比分析了datatable去重的技巧,非常具有实用价值,需要的朋友可以参考下 这里主要介绍两种方法： 1? 数据库直接去除重复 select? distinct * fro...
You are climbing a stair case. It takesnsteps to reach to the top.Each time you can either climb 1 or 2 steps. In how many distinct ways can you climb...
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其他好文 时间：
2014-10-27 00:08:57
阅读次数：
277
SELECT语句的执行的逻辑查询处理步骤：(11) (1)FROM (3) JOIN (2) ON (4)WHERE (5)GROUP BY (6)WITH {CUBE | ROLLUP}(7)HAVING (8)SELECT (9)DISTINCT(10)ORDER BY 每个步骤产生一个虚拟.....
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其他好文 时间：
2014-10-26 21:04:48
阅读次数：
203
Follow up for N-Queens problem.
Now, instead outputting board configurations, return the total number of distinct solutions.
class Solution {
private:
int res;
public:
int totalNQuee...
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其他好文 时间：
2014-10-26 15:43:03
阅读次数：
168
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 puzzle.
...
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其他好文 时间：
2014-10-26 14:23:18
阅读次数：
164
Solution: when see question about two strings , DP should be considered first.We can abstract this question to calculate appear times for string T wit...
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其他好文 时间：
2014-10-26 00:12:57
阅读次数：
211
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....
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其他好文 时间：
2014-10-24 22:17:14
阅读次数：
198
