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LeetCode N-Queens II
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
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
LeetCode 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 puzzle. Ea...
分类:其他好文   时间:2015-03-10 17:16:38    阅读次数:161
LeetCode:Climbing Stairs
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
leetcode 52. N-Queens II
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
1063. Set Similarity
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
MySQL中group_concat函数 --- 很有用的一个用来查询出所有group by 分组后所有 同组内的 内容
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
sql 分组合并字符串字段 分享一个小技巧
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
LeetCode --- 51. N-Queens
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
LeetCode --- 52. N-Queens II
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
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