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Logistical challenges using a dual system

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courtlanda last edited by

Someone knows the logical tasks that are being carried out using a binary system on the: https://thecode.media/binary-mouse/
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Trenton last edited by

https://problems.ru/view_by_subject_new.php?parent=102
Look, there are olimpiad targets for different computing systems: double, triple, etc.
Records of which these tasks are carried out, as appropriate, so you can also follow these books.
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Examination of the possibility of computing roots
Software Programming • python python 3.x math • • Mystic

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First option, with roots removed from any non-tribal number:import math while True: try: n = int(input('Введите число: ')) n = math.sqrt(n) print(n) break except ValueError: print('ОШИБКА!!!!!!!!!!!! НЕЛЬЗЯ ВЫВЕСТИ КВАДРАТНЫЙ КОРЕНЬ ИЗ ОТРИЦАТЕЛЬНОГО ЧИСЛА!!!!!!! ПОВТОРИТЕ ВВОД!!!!') continue Second option, with the removal of only a whole root from an intellect number:import math while True: try: n = int(input('Введите число: ')) n = math.sqrt(n) if n % 1 == 0: print(n) break else: print('ОШИБКА!!!! ИЗ ЭТОГО ЧИСЛА НЕ ВЫВОДИТСЯ ЦЕЛЫЙ КОРЕНЬ!!! ПОВТОРИТЕ ВВОД!!!') continue except ValueError: print('ОШИБКА!!!! НЕЛЬЗЯ ВЫВЕСТИ КВАДРАТНЫЙ КОРЕНЬ ИЗ ОТРИЦАТЕЛЬНОГО ЧИСЛА!!! ПОВТОРИТЕ ВВОД!!!') continue
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How do you use a python to use a closed ESA?
Software Programming • python cryptography • • magpie

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The standard procedure for generating RSA keys is approximately:var p = randomPrime(); var q = randomPrime(); var n = p * q; var phi = (p - 1) * (q - 1); var e = 65537; // публичный ключ // расширеный алгоритм Эвклида phi * x + e * y = 1 (x, y) = extEuclidean(phi, e); var d = y; if (d < 0) d += phi; // d - приватный ключ
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It is not possible to add data to the OBD system using pymysql
Software Programming • python pymysql • • elysha

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First, add.connection.commit() aftercursor.execute() Second cursor.fetchone() It doesn't make any sense, because it's a reservoir.INSERTData, not reading (SELECT)
Programme path to systemic challenge
Software Programming • c language linux core • • jeanid

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It's just that you're not supposed to call a nuclear function - they usually work at another level of protection. And if you could just call it that, the core security system would be compromised. It's syscall that solves this problem. And that's how it works, it's different.In Linux for x86, 128 interruptions (0x80) were used for a long time. When the interruption occurs, the processor calls for a special subprogramme that simply causes a function of the nucleus but already at the nucleus level. How does it become clear what to cause? The challenging programme leaves the processor ' s record on the registers. For example, eax contains the right function number (which can be viewed in /usr/include/asm*/unistd.h files and they have a view#define __NR_connect 203 __SYSCALL(__NR_connect, sys_connect) The files may be several - they're platform-dependent.And since the processor is now at the nucleus level, and the user's "pause" software, the nucleus can begin to understand, and if there's a need to do something, it might be better to hit the app. And then schedule the user's tasks. And when the results are made, place in the right registers and instruct the planner to make the task. And for the task itself, it's like nothing happened, but the results are already there.If there is no such interruption (some exotic platform), other techniques are used. Like some non-existent team. The processor generates an exception and is intercepted, and further on the scheme described above.Then I realized that some of the functions were so unhelpful. For example, knowing the current time (no problem with kernel protection, it's not the opening of a file). And we started to figure out how to speed it up. As a result, new ways have begun to emerge, some are even the instructions of the processor. For example, amd invented syscall/sysret.Read. https://habr.com/ru/post/347596/
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What is the use and use of the Os.chroot function?
Software Programming • python • • Avante

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What's the point?According to documentation, the function https://docs.python.org/2/library/os.html#os.chroot :Change the root directory of the current process to the specified route. Availability: Unix.This command you do is call the command chroot(2):$ apropos chroot chroot (2) - change root directory chroot (8) - run command or interactive shell with special root directory ischroot (1) - detect if running in a chroot Unix-type processes have their own Current Working Directory or Actual Directory of Work that is also known as Root Directory or Raíz Directory, when changing the Raíz Directory of a process with os.chroot() you also change it for all your child processes that can be created. To see the Raice Directory of a process you can use the command pwdx that receives the PID from the process. For example:$ pgrep mysqld 1275 $ pwdx 1275 1275: /var/lib/mysql This process of modifying the Raíz Directory is known as "chroot jail" or "jaula chroot" as it prevents the process and its subprocesses (children) from accessing a higher level of the specified.What are your uses?Basically the idea is to isolate a process to:Development and testingUnit controlSeparation of privilegesCompatibilityRecoveryReferences https://es.wikipedia.org/wiki/Chroot http://man7.org/linux/man-pages/man2/chroot.2.html https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/jails.html
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How do you spell it in matlab?
Software Programming • math matlab • • Oba22

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There are no stars where the brackets are needed. That's right.b=y^(abs(x)^(1/3))+(cos(y)^3)*(abs(x-y)*(1+(sin(z)^2)/sqrt(x+y))/(exp(abs(x-y))+(x/2)))
How does it affect the safety of the names of all the classes used in the OBD system?
Software Programming • php mysql security • • emmalee

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For example, http://modx.com/ The php-code of the application (snippets) shall be stored in the OBD for a convenient reset from the admin. Static php-fail is opportune, but default in OBD. Here's the example: https://github.com/yiisoft/yii2/blob/master/framework/rbac/DbManager.php#L249 ♪ Serialized Rule and Permission facilities are stored in OBD. This is a feature of implementation. The degradation of your code may be a lesser approach. For example, we decided to change the name of the class/neumspeis - if you'd like to adjust to the OBD. Loss can be captured by unit-testing.
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Make the output of a command appear on python when you use os.system()
Software Programming • python python 3.x python 2.7 • • amarantha

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First, os.system in practice it is considered as "deprecated" and should not be used in principle except to maintain retrocompatibility. The natural substitute is the module subprocess, much more complete and that allows much more control and communication about the process launched.For Python 3.5 on https://docs.python.org/3/library/subprocess.html#subprocess.run it's a good choice, just redirect the standard output to os.devnull:import subprocess from sys import argv for ip in range(argv[1], argv[2] + 1): out = subprocess.run("ping 192.168.0.{}".format(ip), stdout=subprocess.DEVNULL) if out.returncode == 1: print("192.168.0.{} está apagada.".format(ip)) else: print("192.168.0.{} está encendida.".format(ip)) You can also redirect stderr if you wish.
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The Knight of the Absolute Order.
Software Programming • php algorithm math • • rosemadder

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About getBezierPoints - you can get into a one-way without a class.Look. Let's start points. p[0]♪ p[n-1]♪ After the first step, we're good. q[0] = (p[0] + p[1]) / 2♪ q[1] = (p[1] + p[2]) / 2♪ q[n-2] = (p[n-2] + p[n-1]) / 2I mean,q[i] = (p[i] + p[i+1]) / 2. Next stepr[i] = (q[i] + q[i+1]) / 2 = (p[i] + 2p[i+1] + p[i+2]) / 4. Binomial coefficients appear to arise:r[i] = (C_2^0 p[i + 0] + C_2^1 p[i + 1] + C_2^2 p[i + 2]) / 2^2. (Small mathematics: Induction is easy to prove that the binomatal coefficients will continue: j- levels[i] = (\sum_k=0^{j-1} C_j^k p[i + k]) / 2^j, ♪ (j+1)Mm.t[i] = (s[i] + s[i+1]) / 2 = = (\sum_k=0^j (C_j^k + C_j^{k + 1}) p[i + k]) / 2^{j + 1} = (\sum_k=0^j C_{j + 1}^k p[i + k]) / 2^{j + 1}. Induction base is clear.)So, we need binomatal coefficients. They can be. https://ru.stackoverflow.com/questions/182043 ♪ The final algorithm shall be:int l = count($points); int coeff = 1; point result = $points[0]; for (int idx = 1; idx < l; idx++) { coeff *= (l - idx); coeff /= idx; result += $points[idx] * coeff; } result /= (1 << (l - 1)); // степень двойки If you don't have to split by two, that's what happens:int l = count($points); double alpha = 0.333333; // или любое другое значение между 0 и 1 double beta = 1 - alpha; double beta2alpha = beta / alpha; int coeff = alpha ** (l - 1); // степень point result = $points[0] * coeff; for (int idx = 1; idx < l; idx++) { coeff *= (l - idx); coeff /= idx; coeff *= beta2alpha; result += $points[idx] * coeff; }
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What's the use?
Software Programming • c sharp • • kalena

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Well, unlike in fact the cardinal.The point is, in the first case, you have LeftAnd in the second, Strong Calculation of the answer. This means that the elements of the exit sequence are energetically computed and, in a lazy case, only when requested and only requested.Let's see where the practical difference is.For the case of lazy calculation, the whole sequence is not fully remembered. This means that we do not have memory in the field and cache locality:IEnumerable<int> GenerateHugeSequenceLazy() { for (int i = 0; i < 1000000; i++) yield return 13 * i; } IEnumerable<int> GenerateHugeSequenceEager() { var result = new List<int>(); for (int i = 0; i < 1000000; i++) result.Add(13 * i); return result; } Identify the function in all sequence, compare the memory flow:var seqLazy = GenerateHugeSequenceLazy(); // вычисляем максимум вручную var max = 0; foreach (var v in seqLazy) if (v > max) max = v; var memLazy = GC.GetTotalMemory(forceFullCollection: false); var seqEager = GenerateHugeSequenceEager(); // вычисляем максимум вручную max = 0; foreach (var v in seqEager) if (v > max) max = v; var memEager = GC.GetTotalMemory(forceFullCollection: false); Console.WriteLine($"Memory footprint lazy: {memLazy}, eager: {memEager}"); Result:Memory footprint lazy: 29868, eager: 6323088 Then we have quite a difference. Meaning operations. Energy calculations are made at the time the function is challenged, while lazy calculations occur at the time when the result is used. Therefore, in order to make a real leniency, the state of the arguments will be taken at the time of transfer. This is an example:IEnumerable<int> DoubleEager(IEnumerable<int> seq) { var result = new List<int>(); foreach (var e in seq) result.Add(e * 2); return result; } IEnumerable<int> DoubleLazy(IEnumerable<int> seq) { foreach (var e in seq) yield return e * 2; } Look at the difference:var seq = new List<int>() { 1 }; var eagerlyDoubled = DoubleEager(seq); var lazilyDoubled = DoubleLazy(seq); Console.WriteLine("Eager: " + string.Join(" ", eagerlyDoubled)); Console.WriteLine("Lazy : " + string.Join(" ", lazilyDoubled)); // выводит оба раза 2, покамест различий нет seq.Add(2); // модифицируем исходную последовательность Console.WriteLine("Eager: " + string.Join(" ", eagerlyDoubled)); // 2 Console.WriteLine("Lazy : " + string.Join(" ", lazilyDoubled)); // 2 4 Since lazy calculation occurs when Transfers, we see that when the sequencing changes, the lazy version captures changes.Another example. See what happens if we don't figure out the whole sequence. We shall determine the same sequence vigorously and lenivo:IEnumerable<int> Eager10() { Console.WriteLine("Eager"); int counter = 0; try { var result = new List<int>(); for (int i = 0; i < 10; i++) { Console.WriteLine($"Adding: {i}"); counter++; result.Add(i); } return result; } finally { Console.WriteLine($"Eagerly computed: {counter}"); } } IEnumerable<int> Lazy10() { Console.WriteLine("Lazy"); int counter = 0; try { for (int i = 0; i < 10; i++) { Console.WriteLine($"Adding: {i}"); counter++; yield return i; } } finally { Console.WriteLine($"Lazily computed: {counter}"); } } We only take two elements from the result:foreach (var e in Eager10().Take(2)) Console.WriteLine($"Obtained: {e}"); foreach (var e in Lazy10().Take(2)) Console.WriteLine($"Obtained: {e}"); foreach (var e in Lazy10()) { Console.WriteLine($"Obtained: {e}"); if (e == 1) break; } We get this conclusion to the console:Eager Adding: 0 Adding: 1 Adding: 2 Adding: 3 Adding: 4 Adding: 5 Adding: 6 Adding: 7 Adding: 8 Adding: 9 Eagerly computed: 10 Obtained: 0 Obtained: 1 Lazy Adding: 0 Obtained: 0 Adding: 1 Obtained: 1 Lazily computed: 2 Lazy Adding: 0 Obtained: 0 Adding: 1 Obtained: 1 Lazily computed: 2 See the difference? The blank version ran the cycle only twice and did not identify the chopper.Another difference between cases is when mistakes are reported. If computed, they shall be reported immediately. In the case of a lazy one, only when the result is listed. Example:IEnumerable<int> CheckEagerly(int value) { if (value == 0) throw new ArgumentException("value cannot be 0"); return new List<int> { value }; } IEnumerable<int> CheckLazily(int value) { if (value == 0) throw new ArgumentException("value cannot be 0"); yield return value; } We'll try/catch:Console.WriteLine("Eager:"); IEnumerable<int> seqEager = null; try { seqEager = CheckEagerly(0); } catch (ArgumentException) { Console.WriteLine("Exception caught"); } if (seqEager != null) foreach (var e in seqEager) Console.WriteLine(e); Console.WriteLine("Lazy:"); IEnumerable<int> seqLazy = null; try { seqLazy = CheckLazily(0); } catch (ArgumentException) { Console.WriteLine("Exception caught"); } if (seqLazy != null) foreach (var e in seqLazy) Console.WriteLine(e); The result is:Eager: Exception caught Lazy: Unhandled Exception: System.ArgumentException: value cannot be 0 at Program.<CheckLazily>d__3.MoveNext() in ...\Program.cs:line 59 at Program.Run() in ...\Program.cs:line 45 at Program.Main(String[] args) in ...\Program.cs:line 13 In order to obtain the " best of both worlds " , i.e., a lazy calculation, but a vigorous examination of the arguments, it is easier to divide the function into two: vigorous verification and leniency without verification. For modern versions C#, it is convenient to use the functions assumed:IEnumerable<int> CheckEagerlyEnumerateLazily(int value) { if (value == 0) throw new ArgumentException("value cannot be 0"); return Impl(); IEnumerable<int> Impl() { yield return value; } } Check:Console.WriteLine("Recommended way:"); IEnumerable<int> seqLazy = null; try { seqLazy = CheckEagerlyEnumerateLazily(0); } catch (ArgumentException) { Console.WriteLine("Exception caught"); } if (seqLazy != null) foreach (var e in seqLazy) Console.WriteLine(e); and receivedRecommended way: Exception caught Another case of difference is external data dependence Computation process♪ The next code is trying to influence the calculations by changing the global state. (This isn't a very good code, don't do that in real programs!)bool evilMutableAllowCompute; IEnumerable<int> EagerGet5WithExternalDependency() { List<int> result = new List<int>(); for (int i = 0; i < 5; i++) { if (evilMutableAllowCompute) result.Add(i); } return result; } IEnumerable<int> LazyGet5WithExternalDependency() { for (int i = 0; i < 5; i++) { if (evilMutableAllowCompute) yield return i; } } We use:Console.WriteLine("Eager:"); evilMutableAllowCompute = true; foreach (var e in EagerGet5WithExternalDependency()) { Console.WriteLine($"Obtained: {e}"); if (e > 0) evilMutableAllowCompute = false; } Console.WriteLine("Lazy:"); evilMutableAllowCompute = true; foreach (var e in LazyGet5WithExternalDependency()) { Console.WriteLine($"Obtained: {e}"); if (e > 0) evilMutableAllowCompute = false; } Result:Eager: Obtained: 0 Obtained: 1 Obtained: 2 Obtained: 3 Obtained: 4 Lazy: Obtained: 0 Obtained: 1 We see that changing global data even after formalization of the left function can affect calculations.(This is another argument that functional programming and mute status are poorly combined. )
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Distance between 2 coordinates
Software Programming • java forms math methodes • • Trenton

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Thank you for your help. Thanks to you, I'm a dopper. I only asked for one point, and I had two. I didn't change the method. Changed entry data. Created the second point2 coordinate and further, through the method, has already made correct calculations.Point point1 = new Point(10, 5); Point point2 = new Point(12, 30); System.out.printf("Start value:\nX1 = %f\nY1 = %f\n", point1.getX(), point1.getY()); System.out.printf("X2 = %f\nY2 = %f\n", point2.getX(), point2.getY()); System.out.printf("distance = %f\n", point1.getDistance(point2));
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Validate user system and password that does not work (using sessions)
Software Programming • php mysqli • • zymir

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The judgment is in your sentence. $sql as you have already been mentioned, the problem is that you have forgotten to pass the function mysqli_query() to check if that record exists in your database.I leave an example to your style (Procedures):<?php session_start(); //Verificamos si no es null el formulario. if (isset($_POST['aceptar'])) { require_once 'conexion.php'; //Escapamos caracteres de nuestra cadena. $usuario = mysqli_real_escape_string($conexion,$_POST['usuario']); $contrasena = mysqli_real_escape_string($conexion,$_POST['contrasena']); $sql = mysqli_query($conexion,"SELECT usuario FROM usuarios WHERE usuario='$usuario' AND contrasena='$contrasena' LIMIT 1"); if(mysqli_num_rows($sql)===1) { $_SESSION['conectado']=true; //esta conectado// $_SESSION['usuario']=$usuario; $_SESSION['inicio'] = time(); $_SESSION['expira'] = $_SESSION['inicio'] + (5 * 60); header ("location: menu.php"); } else { echo 'Datos incorrectos.'; } } ?> To create a safer application, I advise you to use https://secure.php.net/manual/es/mysqli.prepare.php or https://secure.php.net/manual/es/pdo.prepare.php Here I leave you a https://es.stackoverflow.com/questions/33420/almacenamiento-de-contrase%C3%B1as-php-y-mysql where you can see a detailed example of saving your password at the Database and then verify it safely.
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0100 in 100 numerical values
Software Programming • php math • • Raziyah00

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Because zero starts on the 8th.Eighty. 0100 equal to 10 64♪
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How does logging module configuration file indicate the correct path?
Software Programming • python python 3.x logic python 3.8 cx freeze • • Amritpal

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Just pointing out the absolute path.
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Calculation of vectors in the polar system
Software Programming • math geometry • • chanisef

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Transition to decart system, deduction, conversion to polar I think it makes sense how to count the corner?

Logistical challenges using a dual system

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How do you spell it in matlab?
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Calculation of vectors in the polar system
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