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## Another subset-sum problem

Make sure that (S = {83, 88, 93, 67, 57, 89, 78, 51, 95, 98, 69, 49}, t = 492) is a positive instance of Susbset Sum.

## Penetration Test – Alfa Wireless Card Monitor Mode Problem

I have a wireless card (Alfa AWUS036H) that I use to test pens in my test network. Because of my recent interest in network hacking, I picked up this card and put it into monitor mode. It scanned networks well and received strong signals from neighboring networks, but when I disconnected it the next day or restarted my computer, it could not detect any networks with the command `airodump-ng wlan0mon` wlan0mon is the interface of the card.

To get the card working again, I would need to reboot the virtual box, unplug the power, or even reboot my computer several times to make it work again. I do not know if it's a software or hardware problem. If this were a real situation, it would not be practicable in any way.

I am running Kali-Linux 2019.1 on Virtual-Box 5.2. My computer is running Windows 10.

## How to add HTML JavaScript?

Hello friends,

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,

## Algorithms – Dynamic length of the union of segments (1d Klee's dimension problem)

Determining the length of the union of segments (one-dimensional clover dimension problem) is a well-known algorithmic problem. In the face of a series of $$n$$ Intervals on the real line, the task is to find the length of their union. There is a simple one $$O (n log n)$$ The solution is to sort the endpoints of all intervals and then go through them while keeping track of some counters.

Now let's look at a dynamic variant of this problem: we receive $$n$$ Segments one after another and the task is to find the length of the current union of segments after each new segment arrives. It seems to be a natural generalization, but I can not find much information about this version of the problem. I wonder if it is still possible to solve this problem $$O (n log n)$$ Time in an offline setting, d. H. if we can get all the segments in advance and preprocess them in some way before giving an answer for each segment.

I think changing a segment tree could be useful here. In each node, we must keep track of the total sum of the lengths of the segments (or their parts) corresponding to that node, as well as the length of their union. However, I can not figure out how to implement this change without the performance of an update falling to linear time in some cases. Maybe using a segment tree is not the right approach and there is a better way.

## The input for the subset problem

1. The subset sum problem: Input: A finite subset S of integers and an integer t. Question:
Is there a subset A ⊆ S, where the members add from A to t? Suppose you have access
to an oracle that answers questions about instances of subset sum. Suppose (S, t) is positive
Instance of subset Sum, specify an algorithm for determining the set A whose members sum
to t. Its algorithm should form at most a polynomial number (as a function of | S |) of Oracle queries to compute A.

2. For this problem, it should be shown that the subset Sum decision problem (see previous exercise)
is in NP.
(a) Define an instance of Subset Sum. Define suitable size parameters for the subset total.
(b) Define the ∃ variable and specify its domain amount (that is, the set of possible solutions).
(c) Show that a domain element of the ∃ variable has a size bounded by a polynomial
(d) Define the examiner function (that is, the predicate) uniquely.
(e) Prove that the polynomial time is calculable and indicate its duration.

## Migration – problem importing source CSV content with HTML

I use migrate_source_csv to import node body fields. The header for my CSV file is "nid, title, body". The body fields contain HTML. My problem is that when importing the HTML code is coded in entity references. See the screenshot below. Here is my migration YML file:

```id: news_article_nodes
label: News article data we want.
migration_group: gdg_group
source:
plugin: csv
path: 'modules/custom/gdg_migration/import/news_article/news_articles.csv'
ids: [nid]
process:
nid: nid
title: title
'body/0/value': body
'body/0/format':
plugin: default_value
default_value: full_html
destination:
plugin: entity:node
overwrite_properties:
- body
default_bundle: news_article
```

I have to miss something. Is there a plugin that imports the data as plain text?

## java – Problem resizing image while preserving appearance

I try to keep the appearance of an image by setting a fixed width. I get the following error message: "Width or height must be> 0 to resize"

This is the code snippet that redistributes:

``````public String getStringImagen(Bitmap bmp) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();

// Dividimos el ancho final por el ancho de la imagen original
float proporcion = 1200 / (float) bitmap.getWidth();

// y después multiplicamos el resultado por la altura de la imagen original para conseguir la altura final
Bitmap resizedBitmap = Bitmap.createScaledBitmap(bitmap,1200,bitmap.getHeight() * (int) proporcion,false);

//Bitmap resizedBitmap = Bitmap.createScaledBitmap(bitmap, 1000, 800, false);
resizedBitmap.compress(Bitmap.CompressFormat.JPEG,80,baos);
//bmp.compress(Bitmap.CompressFormat.JPEG, 90, baos);
byte() imageBytes = baos.toByteArray();
String encodedImage = Base64.encodeToString(imageBytes, Base64.DEFAULT);
return encodedImage;
}
``````

## redhat – Strange problem with FreeRadius and Kerberos

Right now, I'm trying to get my FreeRadius server to communicate with my FreeIPA server, and through a Google tool, I've found that I need to let FreeRadius speak Kerberos to perform user lookups. So I create a Krb5 file under / etc / raddb / mods-enabled / Krb5 with the following content:

``````krb5 {
}
``````

I have created the keytab and this principle exists on FreeIPA.

The main problem I have now is when I start FreeRadius for testing with this command:

``````radiusd -X
``````

I get the following error message:

``````rlm_ldap (ldap): Waiting for bind result...
rlm_ldap (ldap): Bind successful
# Instantiating module "krb5" from file /etc/raddb/mods-enabled/krb5
Using MIT Kerberos library
rlm_krb5 (krb5): Using service principal "radius/resolute.akr.iol.unh.edu@AKR.IOL.UNH.EDU"
rlm_krb5 (krb5): Initialising connection pool
pool {
start = 5
min = 5
max = 10
spare = 3
uses = 0
cleanup_interval = 30
idle_timeout = 60
retry_delay = 1
}
rlm_krb5 (krb5): Opening additional connection (0), 1 of 10 pending slots used
rlm_krb5 (krb5): Opening additional connection (1), 1 of 9 pending slots used
rlm_krb5 (krb5): Opening additional connection (2), 1 of 8 pending slots used
rlm_krb5 (krb5): Opening additional connection (3), 1 of 7 pending slots used
rlm_krb5 (krb5): Opening additional connection (4), 1 of 6 pending slots used
} # modules
} # server
server default { # from file /etc/raddb/sites-enabled/default
/etc/raddb/sites-enabled/default(53): Failed to find "Krb5" as a module or policy.
/etc/raddb/sites-enabled/default(53): Failed to parse "Krb5" entry.
``````

There's a lot more to this issue, but I've just said what I think is important.

As you can see in the last three lines, the configuration file does not exist, but this is clearly the case. Another strange thing is, if you look at the top few lines that even reads it from the Krb5 file and outputs the content in it. So if I miss nothing, I do not understand what's wrong here and why this error still occurs even though the file exists.

## PHP – Problem sorting arrays

Hello, I have a selection in the database that returns the opening hours from Monday to Sunday:

``````SELECT : 'SELECT titulo_horario FROM unidade_funcionamento ' . ' JOIN horariodefuncionamento ON fk_id_horario = id_horario ' . ' WHERE fk_id_unidade =' . \$id . ' ORDER BY ordem_horario';
``````

When it is executed, it returns the following array:

``````array(7) { (0)=> array(1) { ("titulo_horario")=> string(27) "Terça-Feira: 09:00 às 19:00" } (1)=> array(1) { ("titulo_horario")=> string(26) "Segunda-Feira: Não Abrimos" } (2)=> array(1) { ("titulo_horario")=> string(28) "Quinta-Feira: 09:00 às 20:30" } (3)=> array(1) { ("titulo_horario")=> string(20) "Domingo: Não Abrimos" } (4)=> array(1) { ("titulo_horario")=> string(27) "Sexta-Feira: 08:30 às 20:30" } (5)=> array(1) { ("titulo_horario")=> string(22) "Sábado: 08:30 às 19:00" } (6)=> array(1) { ("titulo_horario")=> string(28) "Quarta-Feira: 09:00 às 19:00" } }
``````

How do I sort this array by day of the week?

For example: First the title_horario "Monday: We do not open", then Tuesday and so on, all this in PHP, not in the query.