dynamic programming – Number of lanes through which you can cross N meters by jumping 1,2,3,4 or 5 meters

I'm sorry if this is not the right platform to ask this question. I have been looking for a solution these last two days and I have not been able to find it. Here is the problem:

Design an algorithm that looks for the number of ways you can
Cross N meters by jumping lengths of 1, 2, 3, 4 or 5 meters.
Suppose that N can be a very large number. What is the result
complexity?

Solution:
We can use dynamic programming to solve this problem. Let's use n[k] to represent the number of ways to reach the distance k. This distance can be reached by jumping from one of the previous 5 distances. Thus, the number of ways by which we can reach this distance is the sum of the ways by which we can reach the previous 5 distances:

not[k] = n[k-1] + n[k-2] + n[k-3] + n[k-4] + n[k-5]

The solution is simple for the loop.

FUNCTION ways (N)
Table n[N+1]
not[0] = 1
FOR k IN [1..N]
not[k] = 0
FOR IN [1..min(5, k)+1]
not[k] + = n[k – d]
END FOR
END FOR
RETURN n[N]

This solution has a time complexity of O (N). But we can have even better performances. The given sum can be represented by a 1×5 matrix of units multiplied by a 5×1 matrix of previous elements. If we use the same approach for moving, we can get relationship B[k] = A * B[k-1], or:

B[k] =[not[not
    [n[k-4] ][not[not
    [n[k-3] ][not[not
    [n[k-2] ][not[not
    [n[k-1] ][not[not
    [n[k]   ]A =
    [0  1   0   0   0]
    [0  0   1   0   0]
    [0  0   0   1   0]
    [0  0   0   0   1]
    [1  1   1   1   1]

If b[0] = [0 0 0 0 1]& # 39 ;, [0 0 0 0 1] * B[k] = n[k]. Now, because of B[k] = A * B[k-1], B[k] = A ^ T * B[0]. With that, the solution of our problem can be represented as a relation n[N] = [0 0 0 0 1] * A ^ N * [0 0 0 0 1]"If we use the above-mentioned optimal approach for pow (A, N) computation, this solution has a time complexity O (log N). We must keep in mind that this has a high constant related to this complexity, because the multiplication of the matrix takes time, but for a large enough N, this solution is optimal.

I think this is enough to understand the problem as well as the solution. But I can not understand the problem yet. Since there is no discussion forum about this problem, I can not talk to others about it. An idea or hints? Thank you for your time.

Update:
source of this problem: https://www.toptal.com/algorithms/interview-questions

IDE Cross Platform

Hi
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[ Politics ] Open question: A young terrorist bride from Isis wants to return to the United States. Why does not it just cross the border that the GOP says is wide open?

[ Politics ] Open question: A young terrorist bride from Isis wants to return to the United States. Why does not it just cross the border that the GOP says is wide open? .

Keep Rising UP – The best Android game you've ever played before

This is a discussion on Keep Rising UP – The best Android game you've ever played before in the Advertising marketing forums, which are part of the Internet Marketing category; If you are looking for the best Android game to play in your spare time, then here is the best GAME …

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How do the Conservatives feel after Roger Stone publishes a photo of the judge in his file with a cross?

Roger Stone is SUPER PYSSED OFF.

His arrest was a circus show presenting him as a danger to the public. But they allowed a team of journalists at 30 feet. And then, the judge orders him to gag and forbids him to raise funds for his defense.

No matter which of us would be unhappy to be treated as a culprit even before the trial begins.

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Mobile application development tool

There are many application building platforms that develop applications without digging a hole in the customer's pocket. It is important to select the right platform to develop a mobile application. Mobile application development company uses mobile application development tools to create an application.

Xamarin

Xamarin is the ideal choice for native applications. Xamarin recycles business logic layers and data access across all platforms. This can be useful when features such as large amounts of local data, offline mode, and image recognition need to be implemented. Developing on the C # programming language, it runs on the .NET common language infrastructure. This tool is widely used to create applications for iOS, Windows and Android platforms. Xamarin is a simple framework for communicating with the mobile device API. It also enables mobile application developers to build scalable and robust mobile applications using its quality assurance and testing features.

One of the main benefits of Xamarin is that it usually results in fewer bugs and a shorter time to market. Smaller codes mean fewer bugs and a single test can validate the code of both platforms.

Xamarin believes in team work and gives developers the opportunity to choose from a multitude of free and paid components. Xamarin Component Store includes UI controls, third-party Web services, and cross-platform libraries. Servers like Microsoft Azure, Salesforce and others can be easily integrated into Xamarin. With so many crowns, Xamarin is the king of multiplatform application development.

.

A ♪♪♪♪♪ vs IOS

We have seen the factors that would help choose the platform to use for your first mobile applications, the sad truth remains: there is no yes or no answer to the platform with which startups have to go among the market share of Aan vs ios us.
.

However, although we have trouble finding you an answer to 'An ♪♪♪♪♪ vs iOS: which platform should be chosen by the startups', we give you the answer to the question "When."

When should startups choose iOS first

If you want to integrate the target demographics of the app store, you need to put the first mobile application of your startup on iOS, spending your expenses in an iPhone application development company. Plus, if you're not influenced by the ability of an app to like and be moved to the home screen, the less fragmented world of Apple can s & # 39; Prove useful because you will not have to waste time creating your app for multiple devices.

The advantages of concentration and the ability to generate high revenues make the development of iPhone applications advantageous for business.

When should startups choose An- ♪♪♪♪♪ First

You should start with An- ♪♪♪♪♪ if your audience is not focused on a specific place. Plus, if there are lots of customization basics in your mobile app, use An ♪♪♪♪♪. The benefits of the scope and customization provided by the platform make it almost indispensable for companies to have an An ♪♪♪♪♪ application.

When do startups need to choose both An An and iOS
Vs iOS: what platform that start-ups should choose for the first mobile application also have a third option, one that ends the confusion between iPhone or An – Launch the application on An ♪♪♪♪♪ and on iOS.

If the selection is to be chosen as a solution by companies with sufficient time and money, you need to invest in mobile application development companies that specialize in the development of multiplatform applications in order to seize the opportunity to enjoy the best of all.

Now that we have seen everything – The factors that affect the choice of iOS vs iOS for startups and situations in which we consider that one is better than the other – now is the time to answer a very futuristic and logical question – When does a company have to go from one platform to another?

When does your startup need to extend from one platform to another?

The answer to this question lies in the fact that your application uses all the advantages of the current platform. If your app has reached a point where it now generates constant revenue from the App Store, expand it to Play Store for greater reach.

If your An ♪♪♪♪♪ app has gained enough followers on the Play Store, increase the extent of monetization by directing it to the App Store.

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php – cross a for cycle for a table with a check box

I have a form with a table, this form I use it to place orders for items. The order data is stored in the database. When retrieving data from the database in another page than the one where I fill the form, I visualize the order placed. When they see the materials they have requested, repeated materials come out and unselected materials appear.

It is in this first code that I send my documents via the check box.



EquipmentTo select
material?><type of entry = "check box" name = matteid?> & # 39;>

In this second code, I browse my table of materials with a cycle because it is there that I think that is the problem. Here, I think it's there that I generate materials that I do not select.

$ q = mysql_query ("insert on request (order, date, time, customer, request, vendor, sales, status, amount, import, type, contact, phone, priority)) values ​​(& # 39; $ order & # 39; , "Date," "hour," "customer," "request," & # 39; & # 39; & # 39;; & # 39;; $; & # 39;; & # 39; , & Quot; $ comventas & quot ;, & quot; $ state & # 39; $ st & # 39; $ sts & # 39;; & # 39; $ v & # 39; , & # 39; $ cont, #, & # 39; $ tel, & # 39; $ priority & # 39;) ");

if ($ q)
{
// $ i = 1;
for ($ i = 1; $ i<=24; $i++) {
    $material=$_POST['mat'.$i];
    if($material!=''){
    $m=mysql_query("insert into pedmat (idpedido, idmaterial, material) values ('$pedido', '$i', '$material')");
    }
}
}
if ($q)
{
?>

and in this third code, that's where I generate my table in another page independent of the form to see past orders and see what materials they asked for.

fill in my form here and select the material
enter the description of the image here

and in this second image, when I retrieve the data sent and stored in the DB to display in a new table only, I see elements that I do not select in my first form and my first table.

enter the description of the image here

Cross Iran by train

I decided to travel to Iran and use the train to go to different cities.
For reservation tickets, would you recommend local or international sites?

cross platform – Angular Concepts (2+) and XAML: search for general comparisons / contrasts, equivalent terminology, common traps, etc.

I am currently learning XAML / Xamarin.Forms and of course I am trying to relate its concepts to the framework I know best, namely Angular. Let me be clear that I understand that these two are very different and that they are targeting different platforms (although it seems that work is underway to bring Xamarin to the Web, which is exciting), but there are nevertheless obvious similarities, especially in their architecture. I think it would be really helpful to know how the two differ or when they do essentially the same thing, but with different terminology, but after some extensive research on the web, I'm almost empty.

I am enrolled in the software development program at my local technology school, which requires special attention to computer programming or web development (there is also a mobile solution, but this option is being phased out). I chose the office path and, although I am very comfortable with the .NET framework and C # coding, I only recently learned about XML and XAML ( only WPF) in the last two chapters of .NET II, ​​which is rather the last class of desktop-specific programming I will take.

On the other hand, all software development students (including desktop computers) must take Web I – III courses as well as cross – platform development, which are taught by a younger, more progressive teacher. That's why I'm a little familiar with Angular. and also ionic.

TL; DR Although I prefer to work in the Microsoft world, my ability to create more complex cross-platform applications using Angular / Ionic m incline towards web development. That's why I'm teaching XAML / Xamarin to fill this gap. I request links to resources (and of course all personal experiences) that show the relationships between the two and / or point out major differences, especially in their architecture (eg, models, data link, dependency injection). For those of you who have used both, I would like to hear what you like or not, or if you prefer something completely different from React.

Already, I see two negative votes, if this is not the place to ask this question, thank you for letting me know why and possibly lead me to another forum. I chose to post here because it seems more appropriate for more open questions than for something like StackOverflow.

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IDEquipmentReady
<type of entry = "check box" name = & # 39;& # 39; value = & # 39;& # 39;>