Twointegersarecalled"friendnumbers"iftheysharethesamesumoftheirdigits,andthesumistheir"friendID".Forexample,123and51arefriendnumberssince1+2+3=5+1=6,and6istheir...

BritishastronomerEddingtonlikedtorideabike.Itissaidthatinordertoshowoffhisskill,hehasevendefinedan"Eddingtonnumber", E --thatis,themaximuminteger ...

Givenasequenceofpositivenumbers,asegmentisdefinedtobeaconsecutivesubsequence.Forexample,giventhesequence{0.1,0.2,0.3,0.4},wehave10segments:(0.1)(0.1,0.2)(0.1,0....

PeopleonMarscounttheirnumberswithbase13:ZeroonEarthiscalled"tret"onMars.Thenumbers1to12onEarchiscalled"jan,feb,mar,apr,may,jun,jly,aug,sep,oct,nov,dec"onMars,re...

Forany4-digitintegerexcepttheoneswithallthedigitsbeingthesame,ifwesortthedigitsinnon-increasingorderfirst,andtheninnon-decreasingorder,anewnumbercanbeobtainedby...

AnumberthatwillbethesamewhenitiswrittenforwardsorbackwardsisknownasaPalindromicNumber.Forexample,1234321isapalindromicnumber.Allsingledigitnumbersarepalindromic...

Noticethatthenumber123456789isa9-digitnumberconsistingexactlythenumbersfrom1to9,withnoduplication.Doubleitwewillobtain246913578,whichhappenstobeanother9-digitnu...

Givenacollectionofnumbersegments,youaresupposedtorecoverthesmallestnumberfromthem.Forexample,given{32,321,3214,0229,87},wecanrecovermanynumberssuchlike32-321-32...

Givenanintegerwithnomorethan9digits,youaresupposedtoreaditinthetraditionalChineseway.Output"Fu"firstifitisnegative.Forexample,-123456789isreadas"FuyiYierQiansan...

AnumberthatwillbethesamewhenitiswrittenforwardsorbackwardsisknownasaPalindromicNumber.Forexample,1234321isapalindromicnumber.Allsingledigitnumbersarepalindromic...

处理思路（1）小程序是不是企业主体（2）有没有进行认证（3）如果没有是不可以获取用户手机号码的       ....

XStream、Jaxb是java中用于对象xml序列化/反序列化的经典开源项目，利用它们将对象转换成xml时，经常会遇到日期(Date)、数字按指定格式输出的需求，下面是使用示例：一、日期字段格式化输出1.1xStream1XStreamx=newXStream();2x.registerConverter(newD...

number如果不指定范围默认是可以输入所有位数的小数，numeric如果不指定小数默认是不允许输入小数...

Comparetwoversionnumbersversion1andversion1.Ifversion1>version2return1,ifversion1<version2return-1,otherwisereturn0.Youmayassumethattheversionstringsareno...

项目中trycatch出现这种情况，就去检查下数据库列类型和项目中实体类的id类型是否一致。数据库id是int类型的，项目实体类是String类型的，项目save功能无法保存，导致了我的这个异常。...