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Sqrt BoTime limit:2000/1000 MS (java/others) Memory limit:131072/131072 K (java/others)Total submission (s): 980 Accepted Submission (s): 452Problem Descriptionlet ' s define the functionf(n)=⌊n√⌋ .Bo wanted to know the minimum numberywhich satisfiesfy(n)=1 .NoteF1(N)=F(N),fy(n)=F(fy−1(n)) It is a pity, so Bo can only use 1 unit of time to calculate this function each time.And

" the erratic state, like being heavy taste "eat hurt" ... I have a few ideas for socializing with Twitter: ★ Domestic users share the frequency of life is not high, the main social card words, can not maintain the popularity of micro-Bo and speed, so also need to introduce public topics to reconcile the information ecology. The gene that joins the media, will make Weibo this dish taste more fragrant and richer. ★ Public topics and social networks

VO (Value object) value Objects Typically used for data transfer between business tiers, created with the New keyword, collected by GC, is just like a PO that contains only data. But it should be abstracted out of the business object that can correspond to the table, or not, depending on the business needs. Individuals feel like the DTO (data transfer object) is passed on the web. PO (Persistant object) Persistent object The concept of the O/R mapping occurs when there is no O/R mapping, and n

1, PO, persistence object, persistent Layer objects, object properties and database table of the field one by one corresponding;2, BO, Business object, Business Layer objects, object properties and the current business logic required by the name of the data one by one corresponding;3, VO, View object, Performance Layer objects, object properties and the name of the data displayed on the page one by one corresponding;4, POJO, Plain ordinary Java object

Java object (PO, BO, VO, DTO, POJO, DAO, Entity, JavaBean, JavaBeans) differentiation, pojojavabeans PO: persistent object), Po (persistent object) is the Entity in the Object/Relation Mapping Framework. Each attribute of po basically corresponds to a field in the database table. It is a pure Java object that complies with the Java Bean specifications without adding other attributes and methods. Persistent objects are created by the insert database an

Recently in the write interface to Android, where server data needs to define VO (Value object) object for encapsulation transportFor Vo, PO, BO, Qo,dao,pojo concept is still relatively vague, so here to record:The O/R Mapping is an abbreviation for the Object Relational Mapping. The popular point is that the object is bound to the relational database, and the object is used to represent the relational data. In the world of O/R Mapping, there are two

Vo is a mapping to a table in a database, and a table corresponds to a VODAO is to use VO to access the real table, the operation of the database is done in DAOBo is the business layer that does the logical processingVO, PO, BO, QO, DAO, POJOThe O/R Mapping is an abbreviation for the Object Relational Mapping.The popular point is that the object is bound to the relational database, and the object is used to represent the relational data. In the O/RIn

PO (named bean,entity, etc.) : persistant Object Persistent objects, the display state of records in a database table in a Java object The most vivid understanding is that a PO is a record in the database. The advantage is that a record can be processed as an object and can be easily converted to other objects. BO (named service,manager,business): Business Object Business Objects The main role is to encapsulate the business logic as an object. T

Business Chamber of Commerce operation is Bo once rich three generations of industry? 650) this.width=650; "style=" height:80px; "id=" Paperpicarea "class=" Lp_pic_type_3 "src=" Http://user.qzone.qq.com/ac /b.gif "alt=" B.gif "/>in the industry people feel not to join the people too silly, such a simple thing these people can not understand, we know just met this industry when there will be a lecturer told us 3800 can earn 3.8 million, 69800 can earn

Today with you to share some of the choice of water purifier knowledge, some very professional things may be the choice of water purifier when you do not understand, so I would like to briefly say.First of all, we probably think that the more the filter, the better, in fact, is not the case, there may be a lot of the market like a eight-level filter so look very powerful water purifier, but the basic is the PP cotton and activated carbon circulating filtration, this effect is really not very lar

Po (persistant object) Persistent ObjectThe concept that appears during o/R ing does not exist if there is no o/R ing. usually it corresponds to the data model (database), and some business logic is processed. it can be seen as a Java object mapped to tables in the database. the simplest Po is to correspond to a record in a table in the database. A set of PO can be used for multiple records. the PO should not contain any database operations. VO (Value Object) Value ObjectIt is usually used for

A few words to understand POJO, JavaBean, EJB, DAO, DTO, VO, PO, BO, do 1. POJO POJO (Plain old Java Object) is called by Martin Fowler, Rebecca Parsons and Josh Mackenzie in a speech in 2000. According to Martin Fowler, "Plain old Java object" is literally translated as "pure old-fashioned Java objects," but everyone uses "simple Java objects" to address it. The implication is that there are some private parameters that act as properties of the o

data compared to some other business-to-business, consumer Web site traffic may not be too much, but the antique industry has his limitations, relative to this data on the author to see the No.1 has been antique mall. I observed that this site is based on a large number of long tail words to obtain traffic, the following we take the "Bloodstone price" as an example to detailed analysis of Bo Bao Mall's military, the first site posted out Http://shop

the alias table and the base table, and finally build the context. 2. What are the concepts, implementation methods, and advantages and disadvantages of derived tables and alias tables? The derived table is similar to the database view, and the alias table is renamed in the universe of the database physical table; The derived table can flexibly process complicated data logic, but it is inefficient; The alias table is set based on business needs and is generally used to solve the loop problem i

In the wake of the financial tsunami, the halo on the concept of "Web2.0" is gradually fading."When talking about web, we all thought it was the trend and direction of the future. A large number of organizations have created a bubble in this industry, and it is time to burst; in the future, many video websites are likely to follow suit." According to the reporter's rough statistics, Venture Capital has invested nearly 5 billion

Java (Po,vo,to,bo,dao,pojo) class name Package name explanation2015-04-28 20:11 by Loull, 18 Reading, 0 reviews, Favorites, compilation VO: Value object, view object PO: Persistent object qo: Query ObjectDAO: Data Access Object--also DAO pattern DTO: Data Transfer Object--also DTO modePO: Full Name is Persistant object The most vivid understanding of persistent objects is that a PO is a record in the database. The advantage is that a record can be pro

network load, but here I refer to the data transfer objects between the presentation layer and the service layer.VO (View object) Value ObjectA View object, used for the presentation layer, that encapsulates all the data for a specified page (or component).BO (business object) service objectFrom the business model perspective, see the domain objects in the UML component Domain model. A Java object that encapsulates the business logic, by invoking the

Original Address:several objects of Java (Po,vo,dao,bo,pojo) explained MunandongOne, Po:persistant object persistent objects, can be seen as a Java object mapped to a table in the database. The simplest PO is a record in a table in the corresponding database, and multiple records can be used with a collection of PO. The PO should not contain any operations on the database.Two, Vo:value object value objects. Typically used for data transfer between bu

. ---------------------------------------------------------- Bo: Business Object Encapsulate the business logic as an object (which can include multiple Po. It usually needs to convert Bo into Po to realize data persistence. Otherwise, the PO obtained from the DB, must be converted to Bo for use at the business layer ). There are three main concepts about

methods. This method is used in combination with Po to perform operations on the database.There is almost no possibility or need to convert each other. It is mainly used to encapsulate access to the database. With pojo, pojo can be persistently converted into Po, and PO can be assembled into vo and DTO. Bo: BusinessThe object Business Object encapsulates the Java object of the business logic. by calling the DAO method and combining Po and VO for busi