met

暂且叫它-\"蒙伪树\"-吧-

痞子三分冷 提交于 2019-12-03 05:16:19
今天我看到 o oo 聚聚画线段树,但是ta画的不是很好,于是本人饶有兴趣的研究了那棵无聊的树。 但是它并不满足树的性质,于是命名为伪树。 为了防止太弱和别的巨型数据结构撞名导致尴尬,于是又挂了自己$id$的一部分,叫"蒙伪树"($\text{Miemeng's Erroneous Tree}$)可以简称$\text{MET}$。 其实是样辉三角? 我伪了。 先来张图: 有啥用: 显然没啥用,可以用上面多的要命的节点维护区间最值,或是一些其他的信息。 时间复杂度: 建树:$O(N^2)$ 查询:$O(1)$ 修改:$O(N)$ 所以它是暴力,恩? 空间复杂度: $O(N^2)$ (为什么我不开二维数组?) 一些乱七八糟的性质: 1> 当我们将$LCA$的编号标记为两个数取平均值后的值,这样每一个值就控制了一些点。 这样就可以建一棵新树。 别问我为什么又画了一个(上面的图太丑了,而且我把它丢了) 这样就变成前缀和啦,所以我们可以得出结论,前缀和是对$\text{MET}$的优化(其实$\text{MET}$是对大部分数据结构的劣化(捂脸 于是对前缀和进行位运算优化,得到树状数组。 然后我们发现里面有很多点是无效的,于是删除一些节点。 发现它(像)是线段树。 于是我们又得出结论,线段树也是对$\text{MET}$的优化。 最后我扯一句,如果用倍增优化可以把$\text{MET}

github: No supported authentication methods available

匿名 (未验证) 提交于 2019-12-03 03:06:01
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: i use github and have successfully added and synched files on my laptop in the past. as of recent i started getting " PuTTY Fatal Error: Disconnected: No supported authentication methods available " after running: git pull origin master (or push) however ssh git@github.com returns the correct response: ERROR: Hi username! You've successfully authenticated, but GitHub does not provide shell access Connection to github.com closed. after digging around on github i found this morcel: No supported authentication methods available You should be

Is it possible to have an interface method defined with a generic return type and a concrete implementation define the return type?

匿名 (未验证) 提交于 2019-12-03 02:51:02
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I have would like to create an interface: public interface OperandValue { < T > T getValue (); } I would then like to have a concrete implementation like this: public class NumberOperandValue implements OperandValue { @Override public < Integer > Integer getValue () { // some integer value that is set elsewhere return 1 ; } } Eclipse is underlining the <Integer> giving me a warning that says: The type parameter Integer is hiding the type Integer I appreciate any suggestions on if this can work somehow. I realize that I could define

Perl DBI Error Msg: Can&#039;t call method “selectcol_arrayref” on an undefined value

匿名 (未验证) 提交于 2019-12-03 02:38:01
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: my $dblinks = ''; $dblinks = $dbh->selectcol_arrayref("select db_link from db_links where ticket=\'LOW\'"); my $success = 0; for my $dblink (@$dblinks) { $success = eval { my ($ret) = $dbh->selectrow_array("select 1 from " . $dbh->quote_identifier($dblink, 'SYSIBM', "SYSDUMMY1") ); $ret; }; if ($success) { &Logging (3, $I, "connect_${G_CONNECT_COUNT}", "Connect success for $dblink"); } else { # Read thru the selectcol_array, check for an oracle error $l_msg="$dblink Result doesn't match 1"; @l_errstr=(); &ConnectFailed ($p_host, $p_db, $p

@ng-bootstrap NgbDatepicker met “Can&#039;t bind to &#039;ngModel&#039; since it isn&#039;t a known property of &#039;ngb-datepicker&#039;” [duplicate]

匿名 (未验证) 提交于 2019-12-03 02:31:01
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: This question already has an answer here: Angular 2+ and Observables: Can't bind to 'ngModel' since it isn't a known property of 'select' 5 answers I use @ng-bootstrap/ng-bootstrap and Angular2-cli with NgbDatepicker met errs : NgModule: @NgModule({ imports: [CommonModule,NgbModule.forRoot()], declarations: [TestComponent], exports: [TestComponent] }) component-- export class TestComponent implements OnInit { model: NgbDateStruct; } and html-- < ngb-datepicker #dp [(ngModel)]="model">< /ngb-datepicker> when add TestModule to another module ,

multiprocessing.Process (with spawn method): which objects are inherited?

匿名 (未验证) 提交于 2019-12-03 02:30:02
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: The docs (python 3.4) explain that with spawn , "the child process will only inherit those resources necessary to run the process object's run() method". But which objects are "necessary"? The way I read it suggested to me that all the objects that can be reached from inside run() are "necessary", including arguments passed as args to Process.__init__ , plus whatever is stored in global variables, as well as classes, functions defined in global scope and their attributes. However, this is incorrect; the following code confirms that the

Spring hibernate , how to call some method after transaction commit or transaction rollback

匿名 (未验证) 提交于 2019-12-03 02:18:01
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I need to call some method after transaction succes or rollback. I am using as <bean name = "openSessionInViewInterceptor" class = "org.springframework.orm.hibernate3.support.OpenSessionInViewInterceptor" > <property name = "sessionFactory" > <ref local = "mysessionFactory" /> </property> </bean> <bean id = "txManager" class = "org.springframework.orm.hibernate3.HibernateTransactionManager" > <property name = "sessionFactory" > <ref local = "mysessionFactory" /> </property> </bean> <tx:annotation-driven transaction-manager =

How to draw Bitmap fast in onDraw() method in canvas android

匿名 (未验证) 提交于 2019-12-03 02:06:01
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: I am trying to draw a marker on single tap method in android. when i draw the marker it will draw but it will take more time to draw i.e 30-40 milliseconds some times it takes 2-3 seconds. Here is my code for class in which i have draw method. public class MyItemizedOverlay extends ItemizedOverlay { private ArrayList overlayItemList = new ArrayList (); public MyItemizedOverlay(Drawable pDefaultMarker, ResourceProxy pResourceProxy) { super(pDefaultMarker, pResourceProxy); } @Override public void draw(Canvas canvas, MapView mapView, boolean

Android Studio 3.0 - Unable to find method &#039;com.android.build.gradle.internal.variant.BaseVariantData.getOutputs()Ljava/util/List&#039;

匿名 (未验证) 提交于 2019-12-03 01:49:02
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: Trying to start a new Kotlin project with Android Studio 3.0 Canary 1 displays this error. Full trace: Error:Unable to find method 'com.android.build.gradle.internal.variant.BaseVariantData.getOutputs()Ljava/util/List;'. Possible causes for this unexpected error include: Gradle's dependency cache may be corrupt (this sometimes occurs after a network connection timeout.) Re-download dependencies and sync project (requires network) The state of a Gradle build process (daemon) may be corrupt. Stopping all Gradle daemons may solve this problem.

Calling Objective-C method from C++ method?

匿名 (未验证) 提交于 2019-12-03 01:48:02
可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效,请关闭广告屏蔽插件后再试): 问题: I have a class ( EAGLView ) which calls a method of a C++ class without problems. Now, the problem is that I need to call in that C++ class a objective-C function [context renderbufferStorage:GL_RENDERBUFFER fromDrawable:(CAEAGLLayer*)self.layer]; which I cannot do in C++ syntax. I could wrap this Objective-C call to the same Objective-C class which in the first place called the C++ class, but then I need to somehow call that method from C++ , and I cannot figure out how to do it. I tried to give a pointer to EAGLView object to the C++