runtime

问题 I am trying to compile a simple code in C# using Microsoft.CodeAnalysis.CSharp . The problem is in trying to add the reference to mscorlib.dll . As the CreateFromAssembly method of the MetadataReference class is deprecated I am trying to use the CreateFromFile method (as suggested): var mscorlibAssembly = Assembly.Load(new AssemblyName("mscorlib.dll")).ManifestModule.Assembly; var mscorlibref = MetadataReference.CreateFromFile(mscorlibAssembly.Location); result.Add(mscorlibref); The Location

问题 I'm looking to come up with an polynomial time algorithm that takes input in the form of a graph, G, and an integer, K, and determines whether G is K-vertex connected. I'm thinking that this would likely utilize Depth First Search. I can see how it could be none with a none-polynomial solution, i.e. just deleting K random vertices, running DFS to check for connectivity, and then doing it again with a different group of vertices. A run time of ~O(n^K) is a little much though, and it is

问题 Hello dear programmers, I try to add a DRL to the KieFilesystem after the KnowledgeBase and the KnowledgeSession is built. But the rules actually won't fire. Could you guys please try to help me? Thanks to every solution attempt in advance! MyCode: public class Playground { private String newline = System.getProperty("line.separator"); private int MIN_VALUE = -2147483648; public static void main(String[] args) { Playground pg = new Playground(); pg.doRules(); } private String

问题 Basically, when I type these commands in the terminal by hand, the sift program works and writes a .key file, but when I try to call it from my program, nothing is written. Am I using the exec() method correctly? I have looked through the API and I can't seem to spot where I went wrong. public static void main(String[] args) throws IOException, InterruptedException { //Task 1: create .key file for the input file String[] arr = new String[3]; arr[0] = "\"C:/Users/Wesley/Documents/cv/final

问题 I was making a table of different run-times for Python 2.7, and noticed a thing that I cannot explain: The run-time of repr(2**n) and int('1'*n) is O(n^2) . I always assumed that converting between integer and string would be O(n) with n being number of digits. The results show that if O(n) fitting gives ~30% error, while O(n^2) is only ~5%. Could anyone explain please. Here are the results that I get (codes are below): Test Number-1 -- time to compute int('1'*n) (fit to O(n**2)) Spec_string:

问题 We have a bomb that is ticking and may explode. This bomb has n switches, that can be moved up or down. Certain combinations of these switches trigger the bomb, but only one combination disables it. Our task is to move the switches from the current position to a position that disables the bomb, without exploding it in the meantime. The switches are big and awkward, so we can move only one switch at a time. We have, lets say, n = 4 switches currently in position ^vvv. We need to get them to

问题 i want to write my java programm as performant as i can so i'm reducing everything to have best performance... In the programm a method will called apprx. 9million times. there i have to calculate somthing, just subtracting two integers and these are needed twice. so my question is, what is faster: initialize new integer with the result of calculation or just calculate the values twice? e.g: int result = a-b; methodToCall(result, foo, bla); otherMethod(result, bla, foo); or methodToCall(a-b,

问题 For 3-way Quicksort (dual-pivot quicksort), how would I go about finding the Big-O bound? Could anyone show me how to derive it? 回答1: There's a subtle difference between finding the complexity of an algorithm and proving it. To find the complexity of this algorithm, you can do as amit said in the other answer: you know that in average , you split your problem of size n into three smaller problems of size n/3 , so you will get, in è log_3(n)` steps in average, to problems of size 1. With

问题 Here is the error: 02-14 02:00:55.663 907-907/com.wlodsgn.bunbunup E/AndroidRuntime﹕ FATAL EXCEPTION: main Process: com.wlodsgn.bunbunup, PID: 907 java.lang.RuntimeException: Unable to start activity ComponentInfo{com.wlodsgn.bunbunup/com.wlodsgn.bunbunup.MenuActivity}: java.lang.NullPointerException at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2195) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245) at android.app.ActivityThread.access$800

问题 I made a script which installs several applications (Adobe Reader, Spotify, Microsoft Office, etc.). It's used after Windows installation. I would like to display estimated remaining time of current installation. The problem is it differs per computer. How to calculate remaining time using time taken to install previous applications, amount of applications in total and the count of already installed applications. Average wouldn't help since some applications install 10 seconds and other 5