题意:求最长的合法括号序列 解:栈+分类讨论 now表示已经算出的序列,且此序列与现在扫描的序列可能能够连接,tmp表示现在扫描到的序列长度 左括号入栈 右括号:1.栈空时:统计当前总长 并且将栈,now,tmp清空 2.栈不空:(1)匹配:tmp+2,弹栈,如果弹栈后栈为空,now=now+tmp相当于把现在算出的和之前算出的连起来,因为此时栈空,已经没有括号挡在两段序列之间 (2)不匹配:now=tmp=0,栈清空 #include<cstdio> #include<iostream…

As we all know, there are many interesting (H) games in kennethsnow’s computer. But he sets a password for those games. Zplinti1 wants to crack his password and play those games. Kennethsnow uses only 6 kinds of characters to form his password: brack…

In Galgame We Trust Time Limit: 3000/1000MS (Java/Others)     Memory Limit: 65535/65535KB (Java/Others) As we all know, there are many interesting (H) games in kennethsnow’s computer. But he sets a password for those games. Zplinti1 wants to crack hi…

配置greenplum客户端认证 配置pg_hba.conf cd /home/gpadmin/gpdbdata/master/gpseg- vim pg_hba.conf 增加 host all gpadmin trust [gpadmin@ gpseg-]$ export PGDATA=/home/gpadmin/gpdbdata/master/gpseg- [gpadmin@ gpseg-]$ pg_ctl reload -D $PGDATA server signaled 使用Psyco…

出处:http://my.oschina.net/u/1433482/blog/467954?fromerr=WrfxL2Kw 试卷时间 60分钟,请不要在试卷上作答,用A4纸做答题纸作答. 一,中文单项选择题(30分,每个3分) 1．下列哪个语句在Python中是非法的? A.x = y = z = 1                 B.x = (y = z + 1) C.x, y = y, x                        D.x  +=  y 2．关于Python内存管理…

PostgreSQL 12 源码安装 Table of Contents 1. 下载 2. 准备环境 3. 编译安装 4. 设置环境变量 5. 初始化数据库 6. 配置参数文件 6.1. postgresql.conf 6.2. pg_hba.conf 7. 数据库启动与关闭 7.1. 手动 7.2. 开机自动启动 1 下载 官网提供了源码和预安装的版本. 源码需要编译安装,解决依赖包等问题,而预安装的版本要简单很多.只需下载解压, 初始化数据库即可. 本例以源码安装为例:请至官网 下载源码.…

2015 UESTC Winter Training #10 Northeastern Europe 2009 最近集训都不在状态啊,嘛,上午一直在练车,比赛时也是刚吃过午饭,状态不好也难免,下次比赛提前吃饭休息一会儿吧.. 一开始卡在B题,后来发现是题意理解错了,没有看见above,就是不可以回到原点,WA了5发也是够可惜的. 顺利地过了G题之后,就卡在了C题上,要T成doge了T T. A - Asteroids 三维凸包,等看计算几何之后再写 B - Business Center 有一座…

传送门 看了DZYODZYODZYO的题解之后发现自己又sbsbsb了啊. 直接dpdpdp是O(2d)O(2^d)O(2d)更新,O(1)O(1)O(1)查询或者O(1)O(1)O(1)更新,O(2n)O(2^n)O(2n)查询的. 然后我就不会了233. 显然可以利用分块暴力的思想. 每次枚举前半段来计算当前答案,然后枚举后半段来更新dpdpdp数组. 这样效率O(n∗2d2)O(n*2^{\frac d 2})O(n∗22d​)可以通过全部测试点. 代码: #include<bits/st…

Dec. 31, 2015 Stayed up to last minute of 2015, 12:00am, watching a few of videos about top 10 rules for success, and then, think about putting together a blog to share, for a successful year 2016. Top 10 rules for success 1. Jessica Alba2. Oprah Win…

原文链接:http://www.huffingtonpost.com/syed-balkhi/10-biggest-business-mista_b_7626978.html When I started my first business, I made a lot of mistakes (everyone does). While mistakes are unavoidable, you can use the lessons learned by others to prevent t…