spot7.org logo
Home PHP C# C++ Android Java Javascript Python IOS SQL HTML Categories

Big O notation of three for loops


The first loop is executed n times. The second loop executes n/2 times. The third loop is executed k/2 times, which equals to n/4 times.

This gives you a O(n^3) complexity.

Empirical test:

#include <iostream>

using namespace std;

int main () {
    int n = 1000;

    long first = 0, second = 0, third = 0;

    for (int m = 1; m <= n; m++)
    {
        first++;
       for (int k = m; k >= 1; k--)
       {

          second++;
          for (int i = 1; i <= k; i++)
          {
              third++;
          }
        }
     }

    cout << first << " " <<
second << " " << third << endl;

    return 0;
}

result:

1000 500500 167167000

Categories : Java

Related to : Big O notation of three for loops
Silverstripe 3 template loops functions and nested loops
Good morning! I can help you coming to a solution using your scenarios 2 and 3. For the first one I wouldn't know how to address the scope of the first loop correctly. Scenario 2 This one is quite simple. You just need to refer to the general scope Top: ///>sample extension code public function testfn(){ return "<pre>testfn called!</pre>"; }//testfn ///>sample.ss $testfn

Categories : Function
Notation " Class... "
It has nothing to do with Class<?>. The three dots in the end means that the final argument is a varargs argument For more info, check the Java documentation and this StackOverflow answer.

Categories : Java
Use scientific notation with xtable in R
Try: dat.table <- xtable(dat[1:20,] ,digits=-10) "If values of digits are negative, the corresponding values of x are displayed in scientific format with abs(digits) digits." xtable

Categories : R
Array Notation Order of Operations
Luke's comment is right. We can look at the MDN page for operator precedence. Computed Member Access has precedence 1 and Assignment has precedence 16. So the property access expressions are evaluated first, then the assignment operations. Furthermore, Computed Member Access has left-to-right associativity, while Assignment has right-to-left associativity. So, we can think of the first step as p

Categories : Javascript
Unknown array notation javascript
See a reduced test case: var a = [ 'x', 'y', 'z' ]; var o = {}; var i = 1; o[i, 'labelname'] = a[i]; console.log(o); which gives: { labelname: 'y' } The , operator evaluates as whatever is on the right hand side of it. There doesn't appear to be any point in having i, in that code.

Categories : Javascript
Recently Add
Redirecting the output directory of 'mvn package' or 'mvn compile' command
No suitable constructor found for ProductoExtranjero
java Composite design pattern(Directory &File)
Java JTree's ui refresh after removing node from parent
First REST Spring application
How to cancel Indexing of a Solr document using Update Request Processor
PowerMock - Mock a Singleton with a Private Constructor
Calling a Postgres stored function SQL error
Where to store Morphlines Java custom command class?
Generic repository using map
How can I scroll a ScrolledComposited in Eclipse SWT Design view?
2 Frames/layout in 1 Activity
Writing a switch differently
Next button opens another activity when its reaches the array limit
Is EclipseLink MOXy capable of applying JSR-303 Bean Validation when unmarshalling XML to object?
Why my jdk can't work,and before the java_home, there is a space that is not from me
How to add List of objects in a Map
How to make notepad++ function like regular notepad in cmd?
Cell renderer and the lost focus
how can I implement iterable for LinkedList>
Disable Androids image-crunch in eclipse (run as) builds
java 8 lambda myMap.stream().count() != myMap.size() after merging myMap
Issue with Calendar calculation that spans 2 calendar years
JSF 2.0 Spring bean injection
Java Regex ReplaceAll with grouping
Getting any word and last word using sed
Clicking on link on JEditorPane throws IOException
printing out difference of two arrays
Spring Bean Alias in JavaConfig
Using Factory Method to Create Generics
© Copyright 2017 spot7.org Publishing Limited. All rights reserved.