Follow up for N-Queens problem.
Now, instead outputting board configurations, return the total number of distinct solutions.
题意:还是n皇后问题。
思路:时间复杂度要求高了,还是每行每行的放,再开一个三维的标记数组,y-x代表了主对角线,y+x代表了负对角...
分类:
其他好文 时间:
2015-03-11 12:55:52
阅读次数:
119
Subsets问题: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 m...
分类:
其他好文 时间:
2015-03-10 21:01:26
阅读次数:
137
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.
Ea...
分类:
其他好文 时间:
2015-03-10 17:16:38
阅读次数:
161
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...
分类:
其他好文 时间:
2015-03-09 20:38:26
阅读次数:
144
Follow up for N-Queens problem.Now, instead outputting board configurations, return the total number of distinct solutions.[Solution] 1 int totalNQuee...
分类:
其他好文 时间:
2015-03-08 15:39:52
阅读次数:
110
Given two sets of integers, the similarity of the sets is defined to be Nc/Nt*100%, where Nc is the number of distinct common numbers shared by the two sets,
and Nt is the total number of distinct n...
分类:
其他好文 时间:
2015-03-07 17:13:09
阅读次数:
156
本文通过实例介绍了MySQL中的group_concat函数的使用方法,比如select group_concat(name) 。MySQL中group_concat函数完整的语法如下:group_concat([DISTINCT] 要连接的字段 [Order BY ASC/DESC 排序字段] [...
分类:
数据库 时间:
2015-03-07 15:37:11
阅读次数:
196
SELECT distinct a.企业名称
,stuff((SELECT ';'+ Tag FROM [JUSFOUN].[dbo].[重庆-贵州企业_处理_整合] WHERE 企业名称=a.企业名称 FOR xml path('')),1,1,'') AS BODY
FROM [JUSFOUN].[dbo].[重庆-贵州企业_处理_整合] a
group by a...
分类:
数据库 时间:
2015-03-07 14:17:02
阅读次数:
126
题目链接:N-Queens
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...
分类:
其他好文 时间:
2015-03-07 11:39:45
阅读次数:
179
题目链接:N-Queens II
Follow up for N-Queens problem.
Now, instead outputting board configurations, return the total number of distinct solutions.
这道题的要求是返回N皇后问题总共有多少不同情况。
和N-Queens问题一样,同样的思路,至少这个是统计数量...
分类:
其他好文 时间:
2015-03-07 11:38:06
阅读次数:
132