(intI=head[now]; I I=edge[i].next)if(edge[i].to!=Last ) DFS (Edge[i].to,now); Pr[now]=++DFN; del[dfn]=-1;}namespacesplaytree{intfa[maxn],son[maxn][2],SZ,ROOT,LN[MAXN],RN[MAXN],POS[MAXN]; LL SUM[MAXN],TAG[MAXN]; //LN records the number of left, RN record right number, tag tag #defineLS (x) son[x][0]#defineRS (x) son[x][1]#defineINF 1000100inlinevoidUpdate (intNow ) {Sum[now]=sum[ls (now)]+sum[rs (no
Baidu Real-time Push API interface application example, API example
Site Quality good site can be in the Baidu Webmaster Platform/Data submitted/sitemap column to see the real-time push function, the current tool is invited to open, Baidu Real-time push API interface can be real-time push our new release of the article, to ensure that Baidu in the first time included.Baidu Webmaster Platform http://zhanzhang.baidu.com/
Open the Baidu Webmaster platform, click to open the real-time push to add
to the bcnf and 4nf paradigms. How can we compare the advantages and disadvantages of these three decomposition solutions? When dividing a relational model into multiple relational models, what else do you need to consider in addition to improving the degree of standardization? 1. Equivalent Standard of pattern decomposition 2. Several facts about pattern decomposition
1. Equivalent Standard of pattern Decomposition In the normali
'Tom ', '2017-6-20', 2011UnionSelect 'dick', '2017-6-20 ', 2011UnionSelect 'Harry ', '2017-6-20', 2010UnionSelect 'Harry ', '2017-6-20', 2011
Go
---- Method 1: Use left join for queries (SQL 2000 or later)Select B. name, B. maxdate, y. salary, B. maxdate2, z. salaryFrom (select a. name, a. maxdate, MAX (x. sal_date) as maxdate2From (select w. name, MAX (w. sal_date) as maxdateFrom salaries as wGroup by w. name) asLeft outer join salaries as x on a. name = x. name and a. maxdate> x. sal_dateGrou
visitor, and the number of visitors (00:00-24:00) within a day. Access to the same cookie within one day is calculated 1 times.Standalone IPThe same IP address is computed only once in the 00:00-24:00Second, nginx configurationVersionNginx version:nginx/1.10.2Log Configuration entryAccess_log/var/log/access.log access;Log format
Log_format access ' $remote _addr-$remote _user [$time _local] "$request" $request _body '' $upstream _addr $upstream _response_time $request _time '' $
Introduction to algorithms-Dynamic Planning (steel strip cutting)Steel strip cutting
An existing steel strip with a length of n inches and a price list
Pi
, Seeking for cutting solutions to maximize sales benefits
Rn
Max
Steel Strip with n inches in length
2n? 1
Different Cutting schemes, because each inch position can decide to cut or not cut.
To get
Rn
Maximum: You can divide the p
built a few years ago are still the main players. At this time, those with good performance are very different from those with slow running.
Since the release of React Native for iOS and Android versions, our team has been improving the scrolling performance of the List View and optimizing memory occupation, it makes the UI more responsive and accelerates application startup. In this case, application startup is an initial impression and a pressure source for other parts of the framework. There
1, under Linux to obtain the most CPU-intensive 10 processes, you can use the following command combination:PS Aux|head-1;ps aux|grep-v pid|sort-rn-k +3|head 2, under Linux to get the memory resources up to 10 processes, you can use the following command combination:PS Aux|head-1;ps aux|grep-v pid|sort-rn-k +4|head3, command combination resolution (for CPU, men also the same reason):PS Aux|head-1;ps aux|gr
Site Quality good site can be in the Baidu Webmaster Platform/Data submitted/sitemap column to see the real-time push function, the current tool is invited to open, Baidu Real-time push API interface can be real-time push our new release of the article, to ensure that Baidu in the first time included.Baidu Webmaster Platform http://zhanzhang.baidu.com/Open the Baidu Webmaster platform, click to open the real-time push to add new data interface to get token API push address:http://Ping.baidu.com/
Website Quality good site can be in the Baidu Webmaster Platform/Data submitted/sitemap column to see real-time push the function, the current tool is invited to open, Baidu real-time push API interface can be real-time push to send us new articles, to ensure that Baidu in the first time included.Baidu Webmaster Platform http://zhanzhang.baidu.com/
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R7
v4
"
R8
v5
"
R9
V6
"
R10
sl
stack limit
R11
fp
frame pointer
R12
IP
Internal procedure Call Register
R13
sp
stack pointer
R14
lr
Connection Register
R15
pc
program counter
IP is shorthand for instruction pointers.
These names are not defined by t
;Effect 3: Group by ID merge nameSQL CodeSelect Id,wm_concat (name) name from the test group by ID;The SQL statement is equivalent to the following SQL statement:SQL Code--------Scope of application: 8i,9i,10g and later (MAX + DECODE)Select ID,Max (Decode (RN, 1, name, null)) | |Max (Decode (RN, 2, ', ' | | name, NULL)) | |Max (Decode (RN, 3, ', ' | | name, NULL)
rbo.object_id are NULLIn CBO mode:The not exist method is the most time-consuming and logical I/OCenter Outer ConnectionThe not in method is bestIn RBO mode:The not in method is the worstCenter Outer ConnectionNot exist bestIn conclusion,1) First, the outer connection method realizes the anti-connection, because in the Rbo and the CBO, the performance can2) Under the CBO, you can use not in, so use the hint statement to force the CBO optimization plan when using not.In addition, when implementi
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