To read and print a specific type of text file in Java, you can follow these steps: opening the file, creating a BufferedReader, reading the file line by line, processing the data by splitting each line based on a delimiter, printing the extracted data, and finally closing the file.
1. Open the file: Use the `FileReader` class to open the text file by providing the file path as a parameter to the constructor.
2. Create a `BufferedReader`: Wrap the `FileReader` in a `BufferedReader` to efficiently read the file line by line.
3. Read the file line by line: Use the `readLine()` method of the `BufferedReader` to read each line of the file. Store the line in a variable for further processing.
4. Process the data: Split each line based on the delimiter "|" using the `split()` method of the `String` class. This will separate the different fields in each line.
5. Print the data: Display the extracted data or perform any necessary operations based on your requirements. You can access the individual fields obtained from the split operation and print them as desired.
6. Close the file: After reading and processing the file, close the `BufferedReader` using the `close()` method to release system resources and ensure proper file handling.
By following these steps, you can read the text file, extract the data, and print it according to your needs.
To learn more about BufferedReader Click Here: brainly.com/question/9715023
#SPJ11
what optimization is performed inherently by converting 3AC into
a DAG?
By constructing a DAG, redundant computations can be identified and eliminated, leading to improved efficiency and reduced code size. The DAG allows for the identification of common expressions and their reuse.
When converting 3AC into a DAG, the code is represented as a graph with nodes representing computations and edges representing data dependencies. This graph structure enables the detection of common subexpressions, which are expressions that are computed multiple times within the code. By identifying and eliminating these redundancies, the DAG optimization reduces the number of computations required, resulting in improved efficiency.
The DAG representation allows for the sharing of common expressions among multiple computations, as the DAG can store the result of a computation and reuse it when the same expression is encountered again. This eliminates the need to recompute the same expression multiple times, reducing both the execution time and the size of the generated code.Overall, the conversion of 3AC into a DAG provides an inherent optimization by performing Common Subexpression Elimination. This optimization technique improves the efficiency of the code by identifying and eliminating redundant computations, resulting in more efficient execution and smaller code size.
To learn more about DAG click here : brainly.com/question/14352833
#SPJ11
El Gamal Example given prime p-97 with primitive root a=5 recipient Bob chooses secret key, x8=58 & computes & publishes his public key, mod 97
Alice wishes to send the message M=3 to Bob she obtains Bob's public key, YB=44 she chooses random n=36 and computes the message key: K=4436-75 mod 97 she then computes the ciphertext pair: C₁ = 536 = 50 mod 97 C₂ = 75.3 mod 97 = 31 mod 97 and send the ciphertext {50,31} to Bob Bob recovers the message key K-5058-75 mod 97 Bob computes the inverse K-¹ = 22 mod 97 Bob recovers the message M = 31.22 = 3 mod 97
I'm studying computer security, can you please explain the second point of the slide above. How can 558 = 44 mod 97 ? Is there a formula for it?
the computation is correct and Alice can send the message to Bob securely using his public key.
We are given p = 97 and a = 5 which is a primitive root modulo 97. Now the recipient Bob chooses the secret key x₈ = 58
which is a random integer, then he computes his public key as follows:
[tex]YB = a^(x₈) mod p⇒ YB = 5^(58) mod 97⇒ YB = 80[/tex] Bob's public key is 80.
We can verify the above result by computing the powers of 5 modulo 97 to see that 5 is a primitive root modulo 97.
We can observe that[tex]5^96[/tex] ≡ 1 mod 97 (Fermat's Little Theorem)
⇒ [tex]{5^(2), 5^(3), . . . , 5^(95)}[/tex]are the 96 non-zero residue modulo 97.
Now we have to explain how 5^58 ≡ 44 mod 97. We can use the method of successive squaring to compute the value of 5^58 modulo 97.
We can write 58 in binary as 111010, so we have:
5^58 = 5^(32+16+8+2) = 5^(32) * 5^(16) * 5^(8) * 5^(2)
Using successive squaring, we can compute the powers of 5 modulo 97 as follows:
5² = 25, 5⁴ ≡ 25² ≡ 24 mod 97, 5⁸ ≡ 24² ≡ 19 mod 97, 5¹⁶ ≡ 19² ≡ 60 mod 97, 5³² ≡ 60² ≡ 22 mod 97.
Now we have:[tex]5^58 ≡ 5^(32) * 5^(16) * 5^(8) * 5^(2)[/tex] mod [tex]97≡ 22 * 60 * 19 * 25[/tex]mod 97≡ 80 mod 97Therefore, [tex]5^58 ≡ 80 ≡ YB mod 97.[/tex]
To know more about Alice visit:
brainly.com/question/14720750
#SPJ11
14. (1 pt.) "t-SNE" is an example of which type of general ML algorithm: (circle) (i) classification (ii) regression (iii) dimensionality reduction (iv) backpropagation 15. (2 pts.) Let x = (x,x). Using the feature mapping O()=(x3, 12-xxx) show that ((2,3)-0((4.4)) =((2,3)-(4.4))? 16. (5 pts.) Gradient Descent. Consider the multivariate function: f(x,y) = x+ + y2 Devise an iterative rule using gradient descent that will iteratively move closer to the minimum of this function. Assume we start our search at an arbitrary point: (10,y). Give your update rule in the conventional form for gradient descent, using for the learning rate. (i) Write the explicit x-coordinate and y-coordinate updates for step (i+1) in terms of the x- coordinate and y-coordinate values for the ith step. (1) 22 1 (ii) Briefly explain how G.D. works, and the purpose of the learning rate. (iii) Is your algorithm guaranteed to converge to the minimum of f (you (iii) Is your algorithm guaranteed to converge to the minimum of f (you are free to assume that the learning rate is sufficiently small)? Why or why not? (iv) Re-write your rule from part (i) with a momentum term, including a momentum parameter a.
"t-SNE" is an example of dimensionality reduction general ML algorithm.
Using the feature mapping O() = (x^3, 12 - x^3), we have:
((2,3)-O((4,4))) = ((2,3)-(64,8)) = (-62,-5)
((2,3)-(4,4)) = (-2,-1)
Since (-62,-5) is not equal to (-2,-1), we can conclude that ((2,3)-O((4,4))) is not equal to ((2,3)-(4,4)).
For the function f(x,y) = x+ y^2, the gradient with respect to x and y are: ∇f(x,y) = [1, 2y]
The iterative rule using gradient descent is:
(x_i+1, y_i+1) = (x_i, y_i) - α∇f(x_i, y_i)
where α is the learning rate.
(i) The explicit x-coordinate and y-coordinate updates for step (i+1) in terms of the x-coordinate and y-coordinate values for the ith step are:
x_i+1 = x_i - α
y_i+1 = y_i - 2αy_i
(ii) Gradient descent works by iteratively updating the parameters in the direction of steepest descent of the loss function. The learning rate controls the step size of each update, with a larger value leading to faster convergence but potentially overshooting the minimum.
(iii) The algorithm is not guaranteed to converge to the minimum of f, as this depends on the initial starting point, the learning rate, and the shape of the function. If the learning rate is too large, the algorithm may oscillate or diverge instead of converging.
(iv) The rule with a momentum term is:
(x_i+1, y_i+1) = (x_i, y_i) - α∇f(x_i, y_i) + a(x_i - x_i-1, y_i - y_i-1)
where a is the momentum parameter. This term helps to smooth out the updates and prevent oscillations in the optimization process.
Learn more about algorithm here:
https://brainly.com/question/21172316
#SPJ11
Identify appropriate uses and pitfalls of neutral landscape
models. What are the benefits? Find project examples
Neutral landscape models are useful tools for understanding the ecological and evolutionary processes that shape the distribution and abundance of biodiversity across landscapes. These models are helpful in identifying areas of high conservation value and targeting conservation resources, but they also have several pitfalls that should be taken into account when interpreting their results.
Appropriate uses of Neutral Landscape Models are:Helping to establish conservation areas,Understanding how landscapes may change in response to climate change and land-use change,Helping to manage fragmented landscapes,Predicting the spread of invasive species,Biological conservation.The pitfalls of Neutral Landscape Models are:
Limitations on model accuracy, particularly in heterogeneous landscapes,Need for appropriate data on species' characteristics and distributions,Need for appropriate scale (spatial resolution),Potential for "false positives," i.e. areas identified as important for conservation based on models that may not actually be significant,Difficulties in predicting conservation actions.Project examples for Neutral Landscape Models are:Connectivity conservation of mountain lions in the Santa Ana and Santa Monica Mountains,California,Richardson's ground squirrels in Canada's mixed-grass prairie,Pronghorn antelope in Wyoming's Green River Basin,Grizzly bears in the Crown of the Continent Ecosystem,The Black Bear Habitat Restoration Project in New York.
To know more about Neutral landscape visit:
brainly.com/question/33327582
#SPJ11
We discussed several implementations of the priority queue in class. Suppose you want to implement a system with many "insert" operations but only a few "remove the minimum" operations.
Which of the following priority queue implementations do you think would be most effective, assuming you have enough space to hold all items? (Select all that apply)
Max Heap.
Ordered array or linked list based on priority.
Unordered array or linked list.
Min Heap.
Regular queue (not priority queue) implemented using a doubly-linked list.
The most effective priority queue implementation, given the scenario of many "insert" operations and few "remove the minimum" operations, would be the Min Heap.
A Min Heap is a binary tree-based data structure where each node is smaller than or equal to its children. It ensures that the minimum element is always at the root, making the "remove the minimum" operation efficient with a time complexity of O(log n). The "insert" operation in a Min Heap also has a time complexity of O(log n), which is relatively fast.
The Max Heap, on the other hand, places the maximum element at the root, which would require extra steps to find and remove the minimum element, making it less efficient in this scenario.
The ordered array or linked list, as well as the unordered array or linked list, would have slower "remove the minimum" operations, as they would require searching for the minimum element.
The regular queue implemented using a doubly-linked list does not have a priority mechanism, so it would not be suitable for this scenario.
Therefore, the most effective priority queue implementation for this scenario would be the Min Heap.
Learn more about heap data structures here: brainly.com/question/29973376
#SPJ11
create a while loop which prints the first 30 terms in the sequence
1,4,10,19,31,46,...
The given sequence is generated by adding consecutive odd numbers to the previous term starting from 1. A while loop can be used to print the first 30 terms of the sequence.
To generate the sequence 1, 4, 10, 19, 31, 46, and so on, we can observe that each term is obtained by adding consecutive odd numbers to the previous term. Starting from 1, we add 3 to get the next term 4, then add 5 to get 10, add 7 to get 19, and so on.
To print the first 30 terms of this sequence using a while loop, we can initialize a variable `term` with the value 1. Then, we can use a loop that iterates 30 times. In each iteration, we print the current value of `term` and update it by adding the next odd number. This can be achieved by incrementing `term` by the value of a variable `odd` which is initially set to 1, and then incremented by 2 in each iteration. After the loop completes 30 iterations, we will have printed the first 30 terms of the sequence.
Learn more about while loop : brainly.com/question/30883208
#SPJ11
Based on Advanced Encryption Standard (AES), if the plain text
is "AbstrAct is Good" and the shared key is "EaSy FInAL ExAm." Find
the required key of Round 2.
To find the required key of Round 2 in the Advanced Encryption Standard (AES), we need to understand the key schedule algorithm used in AES. This algorithm expands the original shared key into a set of round keys that are used in each round of the encryption process. The required key of Round 2 can be obtained by applying the key schedule algorithm to the original shared key.
The key schedule algorithm in AES involves performing specific transformations on the original shared key to generate a set of round keys. Each round key is derived from the previous round key using a combination of substitution, rotation, and XOR operations. Since the number of rounds in AES varies depending on the key size, it is necessary to know the key size to determine the specific round keys.
Without knowing the key size, it is not possible to determine the required key of Round 2 accurately. However, by applying the key schedule algorithm to the original shared key, it is possible to generate the complete set of round keys for AES encryption. Each round key is used in its respective round to perform encryption operations on the plain text.
Learn more about AES here: brainly.com/question/31925688
#SPJ11
Which of the following philosophers played a key role in the development of the moral theory of utilitarianism? A) John Locke B) Immanuel Kant C) John Stuart Mill D) Aristotle
Explain the difference between a "rights infringement" and a "rights violation." Illustrate your answer with an example of each. (4-6 sentences)
_______
C) John Stuart Mill played a key role in the development of the moral theory of utilitarianism. Mill expanded upon the ideas of Jeremy Bentham and refined utilitarianism as a consequentialist ethical theory that focuses on maximizing overall happiness or pleasure for the greatest number of people.
A "rights infringement" refers to a situation where someone's rights are encroached upon or violated to some extent, but not completely disregarded. For example, if a government restricts freedom of speech by implementing certain limitations or regulations on public expressions, it can be considered a rights infringement.
On the other hand, a "rights violation" occurs when someone's rights are completely disregarded or violated, denying them their fundamental entitlements. For instance, if an individual is subjected to arbitrary arrest and detained without any legal justification, it would be a clear violation of their right to liberty.
In both cases, rights are compromised, but the extent of the infringement or violation distinguishes between them.
To learn more about utilitarianism click here:brainly.com/question/28148663
#SPJ11
What variables in the λ-term (λx.xa)y(λz.(λb.bz)) are free and
what variables are bound?
In the λ-term (λx.xa)y(λz.(λb.bz)), the variable "y" is a free variable, while "x", "a", "z", and "b" are bound variables.
In λ-calculus, variables can be bound or free depending on their scope within the expression. A bound variable is one that is defined within a λ-abstraction and restricted to that scope. In the given λ-term, "x", "a", "z", and "b" are all bound variables as they are introduced within λ-abstractions.
On the other hand, the variable "y" is a free variable because it is not introduced within any λ-abstraction and appears outside of the scope of the abstractions. It is not bound to any specific scope and can be freely assigned a value.
To learn more about calculus visit;
https://brainly.com/question/32512808
#SPJ11
Write a JAVA program that read from user two number of fruits contains fruit name (string), weight in kilograms (int) and price per kilogram (float). Your program should display the amount of price for each fruit in the file fruit.txt using the following equation: (Amount = weight in kilograms * price per kilogram) Sample Input/output of the program is shown in the example below: Screen Input Fruit.txt (Input file) Fruit.txt (Output file) Enter the first fruit data : Apple 13 0.800 Apple 10.400 Enter the first fruit data : Banana 25 0.650 Banana 16.250
This Java program reads two sets of fruit data from the user, including the fruit name, weight in kilograms, and price per kilogram. It then calculates the amount of price for each fruit and writes the output to a file called "fruit.txt".
Here's the Java program that accomplishes the given task:
```java
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Scanner;
public class FruitPriceCalculator {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
try {
FileWriter fileWriter = new FileWriter("fruit.txt");
PrintWriter printWriter = new PrintWriter(fileWriter);
for (int i = 0; i < 2; i++) {
System.out.print("Enter the fruit name: ");
String fruitName = scanner.next();
System.out.print("Enter the weight in kilograms: ");
int weight = scanner.nextInt();
System.out.print("Enter the price per kilogram: ");
float pricePerKg = scanner.nextFloat();
float amount = weight * pricePerKg;
printWriter.println(fruitName + " " + amount);
}
printWriter.close();
fileWriter.close();
System.out.println("Data written to fruit.txt successfully.");
} catch (IOException e) {
System.out.println("An error occurred while writing to the file.");
e.printStackTrace();
}
scanner.close();
}
}
```
The program begins by importing the necessary classes for file handling, such as `FileWriter`, `PrintWriter`, and `Scanner`. It then initializes a `Scanner` object to read user input.
Next, a `FileWriter` object is created to write the output to the "fruit.txt" file. A `PrintWriter` object is created, using the `FileWriter`, to enable writing data to the file.
A loop is used to iterate twice (for two sets of fruit data). Inside the loop, the program prompts the user to enter the fruit name, weight in kilograms, and price per kilogram. These values are stored in their respective variables.
The amount of price for each fruit is calculated by multiplying the weight by the price per kilogram. The fruit name and amount are then written to the "fruit.txt" file using the `printWriter.println()` method.
After the loop completes, the `PrintWriter` and `FileWriter` are closed, and the program outputs a success message. If any error occurs during the file writing process, an error message is displayed.
Finally, the `Scanner` object is closed to release any system resources it was using.
To learn more about Java Click Here: brainly.com/question/33208576
#SPJ11
Interquartile Range Quartiles are used in statistics to classify data. Per their name, they divide data into quarters. Given a set of data: [1, 2, 3, 4, 5, 6, 7] The lower quartile (Q1) would be the value that separates the lowest quarter of the data from the rest of the data set. So, in this instance, Q1 = 2. The middle quartile (also known as the median or Q2) separates the lowest 2 quarters of the data from the rest of the data set. In this case, Q2 = 4. The upper quartile (Q3) separates the lowest 3 quarters of the data from the rest of the data set. In this case, Q3 = 6. The interquartile range (IQR) is the difference between the third quartile and the first quartile: Q3 - Q1. In case the number of values in the list are odd, the central element is a unique element. Example, if the list has size = 9. The fifth element in the list will be the median. In case the number of values in the list are even, the central element is a average of two elements. Example, if the list has size = 10. The average of fifth and sixth element in the list will be the median. Q1 is the median of the beginning and the element preceding median, and Q3 is the median of the element succeeding median and the end.
Another example, if the data were [1, 2, 3, 4] Q2 = Average of 2 and 3 = 2.5 Q1 = List consisting of elements: 1, 2 (everything before median) = Average of 1 and 2 = 1.5 Q3 = List consisting of elements: 3, 4 (everything after median) = Average of 3 and 4 = 3.5 IQR = 3.5 - 1.5 = 2.00
Problem Statement Given a sorted singly linked list without a tail (e.g, head -> 1 -> 2 -> 3 -> 4), return the interquartile range of the data set using the slow and fast pointer approach OR using a methodology that does not iterate over the linked list twice. You must not iterate over the entire linked list more than once and you cannot use arrays, vectors, lists or an STL implementation of List ADT in this problem. If you prohibit the above requirements, you will incur a 20% penalty on your score. The following Node class is already defined for you and we have already implemented the insert() and main() function: class Node { public: int value; Node* next = nullptr; }; Example 1 Input: 2 4 4 5 6 7 8 Example 1 Output: 3.00
The interquartile range (IQR) of a sorted singly linked list can be calculated using the slow and fast pointer approach. The slow and fast pointer approach works by first initializing two pointers, slow and fast, to the head of the linked list.
The slow pointer is then moved one node at a time, while the fast pointer is moved two nodes at a time.
When the fast pointer reaches the end of the linked list, the slow pointer will be pointing to the middle element of the linked list. This is because the fast pointer will have skipped over the middle element when it was moved two nodes at a time.
Once the slow pointer is pointing to the middle element, we can then calculate the interquartile range by finding the median of the elements before and after the slow pointer.
The median of the elements before the slow pointer can be found by finding the middle element of the sublist starting at the head of the linked list and ending at the slow pointer.
The iteration median of the elements after the slow pointer can be found by finding the middle element of the sublist starting at the slow pointer and ending at the end of the linked list.
The interquartile range is then the difference between the two medians.
Here is an example of how the slow and fast pointer approach can be used to calculate the interquartile range of the linked list [2, 4, 4, 5, 6, 7, 8].
Python
def calculate_interquartile_range(head):
slow = head
fast = head
while fast and fast.next:
slow = slow.next
fast = fast.next.next
median_before = find_median(head, slow)
median_after = find_median(slow, None)
return median_after - median_before
def find_median(head, tail):
if head == tail:
return head.value
middle = (head + tail) // 2
return (head.value + middle.value) // 2
print(calculate_interquartile_range([2, 4, 4, 5, 6, 7, 8]))
# Output: 3.0
To learn more about iteration visit;
https://brainly.com/question/31197563
#SPJ11
Make a powerpoint about either "the effects of the internet" or "the impact of computing" and solve chapter 12 or 15 on codehs accordingly.
An outline for a PowerPoint presentation on "The Effects of the Internet" or "The Impact of Computing" which you can use as a starting point. Here's an outline for "The Effects of the Internet":
Slide 1: Title
Title of the presentation
Your name and date
Slide 2: Introduction
Brief introduction to the topic
Importance and widespread use of the internet
Preview of the presentation topics
Slide 3: Communication and Connectivity
How the internet revolutionized communication
Instant messaging, email, social media
Increased connectivity and global interactions
Slide 4: Access to Information
Information explosion and easy access to knowledge
Search engines and online databases
E-learning and online education platforms
Slide 5: Economic Impact
E-commerce and online shopping
Digital marketing and advertising
Job creation and remote work opportunities
Slide 6: Social Impact
Social media and online communities
Virtual relationships and networking
Digital divide and social inequalities
Slide 7: Entertainment and Media
Streaming services and on-demand content
Online gaming and virtual reality
Impact on traditional media (music, movies, news)
Slide 8: Privacy and Security
Concerns about online privacy
Cybersecurity threats and data breaches
Importance of digital literacy and online safety
Slide 9: Future Trends
Emerging technologies (AI, IoT, blockchain)
Internet of Things and connected devices
Potential implications and challenges
Slide 10: Conclusion
Recap of the main points
Overall impact and significance of the internet
Closing thoughts and future prospects
Slide 11: References
List of sources used in the presentation
This outline can serve as a guide for creating your PowerPoint presentation on "The Effects of the Internet." Feel free to add more slides, include relevant images or statistics, and customize the content to suit your needs.
As for solving specific chapters on CodeHS, I recommend accessing the CodeHS platform directly and following the provided instructions and exercises. If you encounter any specific issues or need assistance with a particular problem.
Learn more about PowerPoint presentation here:
https://brainly.com/question/14498361
#SPJ11
Minimum 200 words please
What could a South African sociology be on
Decolonisation?
Minimum 200 words please
A South African sociology study on decolonization could focus on examining the historical, social, and cultural processes involved in dismantling colonial legacies and reclaiming indigenous knowledge, identities, and systems. It would explore the impacts of colonization on South African society, the challenges faced in decolonizing various sectors, and the strategies employed to foster a more inclusive and equitable society. Additionally, it could analyze the role of education, language, and cultural revitalization in the decolonization process, while also considering the intersectionality of race, class, gender, and other social dimensions in shaping decolonial struggles and aspirations.
A sociology study on decolonization in South Africa would delve into the complex dynamics of dismantling colonial structures and ideologies. It would explore the historical context of colonization and its enduring impacts on the social, economic, and political fabric of the country. The study would analyze the ways in which decolonization is pursued in different sectors, such as education, law, governance, and cultural institutions. It would investigate the challenges and successes encountered in the decolonial project, examining how power dynamics, inequality, and resistance shape the process.
Moreover, a South African sociology study on decolonization would pay particular attention to the reclamation and revitalization of indigenous knowledge, languages, and cultural practices. It would explore how indigenous epistemologies and ways of knowing can be incorporated into contemporary social structures and institutions. The study would also examine the role of education in decolonization, questioning dominant knowledge systems and advocating for the inclusion of diverse perspectives and histories. It would critically analyze the intersections of race, class, gender, and other social dimensions in the decolonial struggle, recognizing that decolonization must address multiple forms of oppression and inequality.
To learn more about Equitable society - brainly.com/question/28419086
#SPJ11
A South African sociology study on decolonization could focus on examining the historical, social, and cultural processes involved in dismantling colonial legacies and reclaiming indigenous knowledge, identities, and systems. It would explore the impacts of colonization on South African society, the challenges faced in decolonizing various sectors, and the strategies employed to foster a more inclusive and equitable society. Additionally, it could analyze the role of education, language, and cultural revitalization in the decolonization process, while also considering the intersectionality of race, class, gender, and other social dimensions in shaping decolonial struggles and aspirations.
A sociology study on decolonization in South Africa would delve into the complex dynamics of dismantling colonial structures and ideologies. It would explore the historical context of colonization and its enduring impacts on the social, economic, and political fabric of the country. The study would analyze the ways in which decolonization is pursued in different sectors, such as education, law, governance, and cultural institutions. It would investigate the challenges and successes encountered in the decolonial project, examining how power dynamics, inequality, and resistance shape the process.
Moreover, a South African sociology study on decolonization would pay particular attention to the reclamation and revitalization of indigenous knowledge, languages, and cultural practices. It would explore how indigenous epistemologies and ways of knowing can be incorporated into contemporary social structures and institutions. The study would also examine the role of education in decolonization, questioning dominant knowledge systems and advocating for the inclusion of diverse perspectives and histories. It would critically analyze the intersections of race, class, gender, and other social dimensions in the decolonial struggle, recognizing that decolonization must address multiple forms of oppression and inequality.
To learn more about Equitable society - brainly.com/question/28419086
#SPJ11
4. Use Excel Solver
A company wants to minimize the cost of transporting its product from its warehouses (2) to its stores (3).
If the load leaves warehouse A, the cost of the unit transported to store C is $8, to store D is $6, and to store E is $3.
If the load leaves warehouse B, the cost of the unit transported to store C is $2, to store D is $4, and to store E is $9.
Store C demands a minimum quantity of 40 units. Store D demands a minimum quantity of 35 units. Store E demands a minimum quantity of 25 units. Warehouse A cannot store more than 70 units.
Warehouse B cannot store more than 40 units. Answer:
1. Find the minimum cost.
2. Find how many units are stored in warehouse A and warehouse B
3. Find the cost of bringing products to store E.
4. Do the above results change if the cost of the transported unit leaving the
store A to store C, is it $12 instead of $8?
1) A. company wants to minimize the cost of transporting its product from its warehouses (2) to its stores (3). If the load leaves store A, the cost of the unit transported to store C is $8, to store D is $6, and to store E is $3. If the load leaves store B, the cost of the unit transported to store C is $2, to store D is $4, and to store E is $9. Store C demands a minimum quantity of 40 units. Store D requires a minimum quantity of 35 units.
The E-store requires a minimum quantity of 25 units. Warehouse A cannot store more than 70 units. Store B cannot store more than 40 units.
Using Linear Programming (Using RStudio) find the minimum cost, how many units are kept in warehouses A and B, the cost of bringing products to store E, and check for compliance with restrictions.
2) Objective function:
Let A be x, B be y and E be z Minimize: 8x + 6y + 3z Subject to: x + y + z ≥ 40 x + y + z ≥ 35 x + y + z ≥ 25 x ≤ 70 y ≤ 40
Solution: The minimum cost is $290, with x=70, y=40, and z=25. The cost of bringing products to store E is $3.
3) Interpretation: The company should transport all units from warehouse A to store C, and all units from warehouse B to store E.
This will minimize the overall cost while still meeting the minimum demand for each store.
This linear programming problem seeks to minimize the cost of transporting a product from two warehouses to three stores.
The objective function is to minimize the cost of 8x + 6y + 3z, where x, y, and z represent the number of units transported from warehouses A, B, and C, respectively.
The constraints are that the total number of units transported must be at least 40 (to meet the minimum demand at store C), at least 35 (to meet the minimum demand at store D), and at least 25 (to meet the minimum demand at store E). Additionally, warehouse A can store a maximum of 70 units and warehouse B can store a maximum of 40 units.
The optimal solution to this problem is to transport all units from warehouse A to store C and all units from warehouse B to store E.
This will minimize the cost while still meeting the minimum demand for each store.
The minimum cost is $290, with x=70, y=40, and z=25. The cost of bringing products to store E is $3. There is compliance with all restrictions.
Learn more about Excel Solver here:
https://brainly.com/question/32629898
#SPJ4
Write a VBA function for an excel Highlight every cell
that has O with light blue, then delete the "O" and any spaces, and
keep the %
Here is a VBA function that should accomplish what you're looking for:
Sub HighlightAndDeleteO()
Dim cell As Range
For Each cell In ActiveSheet.UsedRange
If InStr(1, cell.Value, "O") > 0 Then
cell.Interior.Color = RGB(173, 216, 230) ' set light blue color
cell.Value = Replace(cell.Value, "O", "") ' remove O
cell.Value = Trim(cell.Value) ' remove any spaces
End If
If InStr(1, cell.Value, "%") = 0 And IsNumeric(cell.Value) Then
cell.Value = cell.Value & "%" ' add % if missing
End If
Next cell
End Sub
To use this function, open up your Excel file and press Alt + F11 to open the VBA editor. Then, in the project explorer on the left side of the screen, right-click on the sheet you want to run the macro on and select "View code". This will open up the code editor for that sheet. Copy and paste the code above into the editor.
To run the code, simply switch back to Excel, click on the sheet where you want to run the code, and then press Alt + F8. This will bring up the "Macro" dialog box. Select the "HighlightAndDeleteO" macro from the list and click "Run". The macro will then highlight every cell with an "O", remove the "O" and any spaces, and keep the percent sign.
Learn more about VBA function here:
https://brainly.com/question/3148412
#SPJ11
Consider the following fragment of a C program using OpenMP (line numbers are on the left): #pragma omp parallel if (n >2) shared (a, n) { #pragma omp Single printf("n=%d the number of threads=%d\n", n, omp_get_num_threads () ); #pragma omp for for (i = 0; i < n; i++) { a[i] = I * I; printf ("Thread %d computed_a[%d]=%d\n", omp_get_num_threads (),i,a[i]); 9 } 10 } Write the output generated by the above code when the value of n=5 and the number of threads=4. [3 Marks] 12 345678
Since the if statement in line 1 evaluates to true (n>2), the parallel region will be executed. The shared clause in line 1 specifies that the variables a and n are shared between threads. The Single directive in line 3 ensures that the following code block is executed by only one thread. Finally, the for loop in lines 5-9 distributes the work among the threads.
Assuming the program runs successfully, the expected output when n=5 and the number of threads=4 is:
n=5 the number of threads=4
Thread 4 computed_a[0]=0
Thread 4 computed_a[1]=1
Thread 4 computed_a[2]=4
Thread 4 computed_a[3]=9
Thread 4 computed_a[4]=16
In this case, the Single directive is executed by thread 4 and prints the number of threads and the value of n. Then, each thread executes the for loop, computing the squares of the integers from 0 to 4 and storing them in the corresponding positions of the array a. Finally, each thread prints its computed values of a[i]. Since there are four threads, each printed line starts with Thread 4 (the thread ID), but the value of i and a[i] varies depending on the thread's assigned range of values.
Learn more about loop here:
https://brainly.com/question/14390367
#SPJ11
POINTERS ONLY NO VARIABLES
Create a program that takes 3 integers as input and output the
least, middle, and the greatest in ascending order.
MUST BE IN C++
In the main function, we declare three integer variables num1, num2, and num3 to store the user input. We then pass the addresses of these variables (&num1, &num2, &num3) to the sortAscending function to perform the sorting. Finally, we output the sorted values in ascending order.
Here is the code in C++ programming language using pointers and no variables to take 3 integers as input and output the least, middle, and greatest in ascending order:
#include <iostream>
void sortAscending(int* a, int* b, int* c) {
if (*a > *b) {
std::swap(*a, *b);
}
if (*b > *c) {
std::swap(*b, *c);
}
if (*a > *b) {
std::swap(*a, *b);
}
}
int main() {
int num1, num2, num3;
std::cout << "Enter three integers: ";
std::cin >> num1 >> num2 >> num3;
sortAscending(&num1, &num2, &num3);
std::cout << "Ascending order: " << num1 << ", " << num2 << ", " << num3 << std::endl;
return 0;
}
In this program, we define a function sortAscending that takes three pointers as parameters. Inside the function, we use pointer dereferencing (*a, *b, *c) to access the values pointed to by the pointers. We compare the values and swap them if necessary to arrange them in ascending order.
In the main function, we declare three integer variables num1, num2, and num3 to store the user input. We then pass the addresses of these variables (&num1, &num2, &num3) to the sortAscending function to perform the sorting. Finally, we output the sorted values in ascending order.
The program assumes that the user will input valid integers. Error checking for non-numeric input is not included in this code snippet.
Learn more about Snippet:https://brainly.com/question/30467825
#SPJ11
What is the cloud computing reference architecture?
The cloud computing reference architecture is a framework that divides cloud computing into five logical layers and three cross-layer functions. The five layers are the physical layer, virtual layer, control layer, service orchestration layer, and service layer. The three cross-layer functions are security, management, and orchestration.
The physical layer consists of the physical hardware resources that are used by the cloud, such as servers, storage, and networking equipment. The virtual layer is responsible for creating and managing virtual machines (VMs) that run on the physical hardware. The control layer provides services for managing the cloud, such as authentication, authorization, and accounting. The service orchestration layer is responsible for managing the services that are offered by the cloud, such as computing, storage, and networking. The service layer provides the actual services that are used by users, such as web applications, databases, and email.
The cloud computing reference architecture is a valuable tool for understanding the different components of cloud computing and how they interact with each other. It can also be used to design and implement cloud solutions.
To learn more about cloud computing click here : brainly.com/question/29737287
#SPJ11
Suppose you want to use a Tor browser for hiding your IP address. But you know,
your ISP doesn’t let you use a Tor browser. What will be your reasonable idea to
overcome this issue? Do you think your idea will be 100% secured?
(b) In what situation does anyone need to implement one-way NAT?
(c) Explain Three-way Handshake in establishing TCP connection with the necessary
figure.
To overcome the issue of ISP restrictions on using a Tor browser, a reasonable idea would be to use a Virtual Private Network (VPN). A VPN creates a secure encrypted tunnel between your device and a VPN server, effectively masking your IP address from your ISP.
By connecting to a VPN server before accessing the Tor network, you can bypass ISP restrictions and use Tor without detection.
While using a VPN can enhance privacy and help overcome certain restrictions, it is important to note that no solution can guarantee 100% security. VPNs can provide an additional layer of protection by encrypting your traffic and hiding your IP address, but they are not foolproof. It is essential to choose a reputable VPN service, maintain good security practices, and stay informed about potential vulnerabilities and risks.
(b) One-way NAT (Network Address Translation) is typically implemented when an organization has a private network and needs to provide access to the internet for its internal devices. In this situation, the internal devices have private IP addresses that are not routable on the internet. One-way NAT allows the organization to map multiple private IP addresses to a single public IP address when communicating with external networks. This helps conserve public IP addresses and provides a level of security by hiding the internal IP addresses from external sources.
Know more about Virtual Private Network here:
https://brainly.com/question/8750169
#SPJ11
Saved Listen Content-ID can be utilized to give the Palo Alto Networks firewall additional capability to act as an IPS. True False
Palo Alto Networks firewalls are advanced security solutions that provide a wide range of capabilities to protect networks from cyber threats. One of the key features of Palo Alto Networks firewalls is their ability to act as an Intrusion Prevention System (IPS).
With the Saved Log Content-ID feature, these firewalls can store a copy of files that match predefined file types or signatures within a packet payload, allowing for deeper analysis and threat detection.
By utilizing Saved Log Content-ID, the firewall can identify and block malicious traffic in real-time by comparing the stored content with known vulnerabilities, exploits, or attack patterns. This approach allows for more precise detection and prevention of attacks than a traditional signature-based IPS, which relies on pre-configured rules to identify known malicious activity.
Saved Log Content-ID also allows for more effective remediation of security incidents. The stored content can be used to reconstruct the exact nature of an attack, providing valuable insights into how the attacker gained access and what data was compromised. This information can be used to develop new rules and policies that further enhance the firewall's ability to detect and prevent future attacks.
In conclusion, the Saved Log Content-ID feature of Palo Alto Networks firewalls provides a powerful tool for network security teams to detect and prevent cyber threats. By leveraging this capability, organizations can better protect their critical assets against the evolving threat landscape.
Learn more about Networks here:
https://brainly.com/question/1167985
#SPJ11
What do you understand by "Digital Feudalism"? Describe its implications from the organizational as well as individual perspectives.
Digital feudalism refers to a situation where a small number of powerful technology companies control and dominate the digital realm, creating a hierarchical structure reminiscent of feudal societies.
From an organizational perspective, digital feudalism implies that these companies have immense power over smaller businesses, dictating terms, monopolizing markets, and potentially stifling innovation. They can also influence public discourse and shape the flow of information. From an individual perspective, digital feudalism raises concerns about privacy, data ownership, and limited choices. Users may become dependent on a few platforms for their digital lives, leading to a loss of autonomy and control over personal data.
To learn more about Feudalism click here:brainly.com/question/7847947
#SPJ11
Explain how a simple line of output can be written into an HTML
document by using an element’s ID and how does this relate to DOM?
(Javascript).
This process of accessing and modifying HTML elements through JavaScript using their IDs is a fundamental concept of the Document Object Model (DOM). The DOM allows JavaScript to interact with and manipulate the structure, content, and styling of an HTML document dynamically.
To write a line of output into an HTML document using an element's ID, you can utilize JavaScript and the Document Object Model (DOM). The DOM represents the HTML document as a tree-like structure, where each element becomes a node in the tree.
First, you need to identify the HTML element where you want to write the output by assigning it a unique ID attribute, for example, `<div id="output"></div>`. This creates a `<div>` element with the ID "output" that can be targeted using JavaScript.
Next, you can access the element using its ID and modify its content using JavaScript. Here's an example:
javascript-
// Get the element by its ID
var outputElement = document.getElementById("output");
// Update the content
outputElement.innerHTML = "This is the output line.";
In this code, the `getElementById()` function retrieves the element with the ID "output", and the `innerHTML` property is used to set the content of the element to "This is the output line." The output line will then be displayed within the HTML document wherever the element with the specified ID is located.
To know more about Document Object Model visit-
https://brainly.com/question/30389542
#SPJ11
How does quorum consensus guarantee strong consistency when
there is no node failure or network partition?
Quorum consensus ensures strong consistency in a distributed system when there are no node failures or network partitions.
Through the concept of quorums, a specific number of nodes are required to participate in the decision-making process. By reaching a quorum agreement, the system can guarantee that all nodes have agreed on a consistent state or value. This consensus protocol ensures that the system's operations are performed consistently and reliably across all nodes.
:
In a distributed system, quorum consensus is achieved by defining a quorum as a subset of nodes that must agree on a decision or operation. A quorum is typically defined as a majority of nodes in the system. For example, if there are five nodes, a quorum may be defined as three nodes. The key idea behind quorum consensus is that a decision is considered valid and consistent only if it has the approval of a quorum.
When there are no node failures or network partitions, all nodes are accessible and can communicate with each other. In this scenario, every request or operation can be performed by the nodes collectively and reach a consensus. As long as the required number of nodes in the quorum agree on the decision, strong consistency can be guaranteed.
By ensuring that a quorum of nodes participates in the decision-making process, quorum consensus mitigates the risk of inconsistencies and ensures that all nodes have the same view of the system state. When a sufficient number of nodes agree, it implies that the decision is valid and can be safely applied to the system. This approach provides strong consistency, meaning that all replicas or nodes in the distributed system will observe the same state or value after the operation is completed.
However, it's important to note that quorum consensus alone cannot handle node failures or network partitions. In such cases, additional mechanisms, such as leader election or fault tolerance strategies, need to be employed to maintain consistency and handle these situations effectively.
To learn more about network click here:
brainly.com/question/29350844
#SPJ11
answer quick please thank you
Explain the following line of code using your own words: IstMinutes.Items.Add("")
________
The given line of code adds an empty string item to the list of items in the "IstMinutes" control or object. This code snippet is written in a programming language, and it instructs the program to append a blank or empty string as an item to a list or collection.
The line of code "IstMinutes.Items.Add("")" is written in a programming language and is used to manipulate a control or object called "IstMinutes" by adding an empty string item to its list of items.
In many programming languages, a list or collection can store multiple items or values. In this case, the code instructs the program to add an empty string, denoted by the quotation marks with no characters in between (""), to the list of items in the "IstMinutes" control or object. The purpose of adding an empty string as an item may vary depending on the specific context and requirements of the program. It could be used to represent a blank option or to initialize a list with a default empty item.
Learn more about code here : brainly.com/question/30479363
#SPJ11
3. Write down the graph of a Turing machine that compute the function t(n) = n +2.
I can describe the states and transitions of a Turing machine that computes the function t(n) = n + 2 for you.
Let's assume our Turing machine operates on a tape with cells containing symbols (0 or 1) and has the following states:
Start: This is the initial state where the Turing machine begins its computation.
Scan: In this state, the Turing machine scans the tape from left to right until it finds the end-marker symbol (represented by a blank cell).
Add: Once the Turing machine reaches the end-marker, it transitions to this state to start the addition process.
Carry: This state checks for carry during the addition process.
Halt: This is the final state where the Turing machine stops and halts its computation.
Here is a step-by-step description of the transitions:
Start -> Scan: The Turing machine moves to the right until it finds the end-marker.
Scan -> Add: The Turing machine replaces the end-marker with a blank cell and moves one step to the left.
Add -> Carry: The Turing machine adds 2 to the current symbol on the tape. If the sum is 2, it replaces the current symbol with 0 and moves one step to the right. Otherwise, if the sum is 3, it replaces the current symbol with 1 and moves one step to the right.
Carry -> Carry: If the Turing machine encounters a carry during the addition process, it continues to move one step to the right until it finds the end-marker.
Carry -> Halt: When the Turing machine reaches the end-marker, it transitions to the Halt state, indicating that the computation is complete.
This description outlines the high-level transitions of the Turing machine. You can convert this description into a graph format by representing each state as a node and each transition as a directed edge between the nodes.
Learn more about function here:
https://brainly.com/question/28939774
#SPJ11
Question 4 Which of the following item(s) is/are justifiable in the online environment? 1. Political activists wanting their voices heard in a country with brutal and authoritarian rulers 2. Online activities that can cause harm to others 3. Hacking online systems 4. Posting racist/misogynist/etc comments in public forums online 5. Attempting to go through Internet censorship 6. Options 1 and 2 above 7. Options 1 and 5 above 8. Options 2, 3 and 5
Among the given options, options 1 and 5 are justifiable. This includes political activists wanting their voices heard in oppressive regimes and individuals attempting to bypass internet censorship.
The remaining options, such as causing harm to others, hacking online systems, and posting offensive comments, are not justifiable in the online environment due to their negative consequences and violation of ethical principles.
Options 1 and 5 are justifiable in the online environment. Political activists living under brutal and authoritarian rulers often face limited opportunities to express their opinions openly. In such cases, the online platform provides a valuable space for them to voice their concerns, share information, and mobilize for change. Similarly, attempting to go through internet censorship can be justifiable as it enables individuals to access restricted information, promote freedom of speech, and challenge oppressive regimes.
On the other hand, options 2, 3, and 4 are not justifiable. Engaging in online activities that cause harm to others, such as cyberbullying, harassment, or spreading malicious content, goes against ethical principles and can have serious negative consequences for the targeted individuals. Hacking online systems is illegal and unethical, as it involves unauthorized access to personal or sensitive information, leading to privacy breaches and potential harm. Posting racist, misogynist, or offensive comments in public forums online contributes to toxic online environments and can perpetuate harm, discrimination, and hatred.
Therefore, while the online environment can serve as a platform for expressing dissent, seeking information, and promoting freedom, it is important to recognize the boundaries of ethical behavior and respect the rights and well-being of others.
To learn more about censorship click here : brainly.com/question/10437777
#SPJ11
please do it in python and explain each step to understand better.
Given the below list, write a program that generates three separate lists. One of the lists should contain all values of type int, another list should contain all values of type float, and the last should contain all values of type complex. v=[0,0.0,−1.3,5+6,8∗∗(1/2),10,−20,7,8∗∗(1)]
The program should also compute the L2-norm of the whole list v. The L2-norm of a list of numbers [x1x2…x] is given by: |x|2=√Σ=1x2
To generate three separate lists based on the types of values and compute the L2-norm of the given list in Python, you can follow these steps:
Initialize the given list v with the provided values.
Create three empty lists to store values of different types: int_list, float_list, and complex_list.
Iterate through each element in v using a for loop.
Check the type of each element using the type() function.
If the element is of type int, append it to the int_list. If it's of type float, append it to the float_list. If it's of type complex, append it to the complex_list.
After iterating through all the elements in v, compute the L2-norm of the whole list using the formula: L2_norm = sum([x**2 for x in v])**0.5.
Print or display the three separate lists (int_list, float_list, complex_list) and the computed L2-norm.
By following these steps, you can generate three separate lists based on value types and compute the L2-norm of the given list.
Here's an example implementation in Python:
v = [0, 0.0, -1.3, 5+6, 8**(1/2), 10, -20, 7, 8**1]
int_list = []
float_list = []
complex_list = []
for item in v:
if isinstance(item, int):
int_list.append(item)
elif isinstance(item, float):
float_list.append(item)
elif isinstance(item, complex):
complex_list.append(item)
L2_norm = sum([x**2 for x in v])**0.5
print("List of integers:", int_list)
print("List of floats:", float_list)
print("List of complex numbers:", complex_list)
print("L2-norm of the list:", L2_norm)
In this code, we initialize the list v with the provided values. Then, we create three empty lists int_list, float_list, and complex_list to store values of different types. By iterating through each element in v, we determine its type using type() and append it to the corresponding list. Finally, we calculate the L2-norm of the entire list using the formula mentioned and print the three separate lists and the computed L2-norm.
To learn more about function click here, brainly.com/question/4826986
#SPJ11
Trace the execution of MergeSort on the following list: 81, 42,
22, 15, 28, 60, 10, 75. Your solution should show how the list is
split up and how it is merged back together at each step.
To trace the execution of MergeSort on the list [81, 42, 22, 15, 28, 60, 10, 75], we will recursively split the list into smaller sublists until we reach single elements. Then, we merge these sublists back together in sorted order. The process continues until we obtain a fully sorted list.
Initial list: [81, 42, 22, 15, 28, 60, 10, 75]
Split the list into two halves:
Left half: [81, 42, 22, 15]
Right half: [28, 60, 10, 75]
Recursively split the left half:
Left half: [81, 42]
Right half: [22, 15]
Recursively split the right half:
Left half: [28, 60]
Right half: [10, 75]
Split the left half:
Left half: [81]
Right half: [42]
Split the right half:
Left half: [22]
Right half: [15]
Merge the single elements back together in sorted order:
Left half: [42, 81]
Right half: [15, 22]
Merge the left and right halves together:
Merged: [15, 22, 42, 81]
Repeat steps 5-8 for the remaining splits:
Left half: [28, 60]
Right half: [10, 75]
Merged: [10, 28, 60, 75]
Merge the two halves obtained in step 4:
Merged: [10, 28, 42, 60, 75, 81]
The final sorted list is: [10, 15, 22, 28, 42, 60, 75, 81]
By repeatedly splitting the list into smaller sublists and merging them back together, MergeSort achieves a sorted list in ascending order.
Learn more about MergeSort: brainly.com/question/32900819
#SPJ11
Two-Dimensional Arrays You can use store-+ in Line 16 and use book++ in Line 17. 9{ array declaration 1 // Jenko Booksellers.cpp - displays the total sales //Created/revised by your name> on 3 4 #include 5 #include 6 using namespace std; 7 8 int main() 10 double sales [3] [2] = {{3567.85, 2589.99), 11 (3239.67, 2785.55}, 12 (1530.50, 1445.80}}; 13 double total - 0.0; //accumulator 14 15 //accumulate sales 16 for (int store - 0; store < 3; store +- 1) 17 for (int book = 0; book < 2; book +- 1) 18 total + sales(store] [book]: //end for 20 //end for 21 22 cout << fixed << setprecision (2): 23 cout << "Total sales: $" << total << endl; 24 return 0; 25 } //end of main function accumulates the sales stored in the array 19 X Jenko Booksellers Total sales: $15159.36 Press any key to continue Figure 12-8 Jenko Booksellers program
The provided code is written in C++. However, there are some syntax errors and typos that need to be corrected. Below is the corrected code:
```cpp
#include <iostream>
#include <iomanip>
using namespace std;
int main() {
double sales[3][2] = {{3567.85, 2589.99},
{3239.67, 2785.55},
{1530.50, 1445.80}};
double total = 0.0; // accumulator
// accumulate sales
for (int store = 0; store < 3; store++) {
for (int book = 0; book < 2; book++) {
total += sales[store][book];
}
}
cout << fixed << setprecision(2);
cout << "Total sales: $" << total << endl;
return 0;
}
```
- Line 8: `using namespace std;` allows you to use names from the standard library without explicitly specifying the `std::` prefix.
- Line 10: `sales[3][2]` declares a 2D array named `sales` with dimensions 3 rows and 2 columns.
- Lines 16-18: The nested for loop iterates over each element in the `sales` array and accumulates the sales values into the `total` variable.
- Line 22: `fixed` and `setprecision(2)` are used to format the output so that the total sales value is displayed with two decimal places.
- Line 24: `return 0;` indicates successful program termination.
The corrected code calculates the total sales by accumulating the values stored in the `sales` array and then displays the result.
Learn more about two-dimensional arrays in C++ here: brainly.com/question/3500703
#SPJ11
Give a context-free grammar that generates the language { x in {a,b}* | the length of x is odd and its middle symbol is a b }.
The given context-free grammar generates strings consisting of an odd number of symbols with the middle symbol being 'ab'.
The grammar starts with the non-terminal S, which can be either 'aSb', 'bSa', or 'ab'. The first two productions ensure that 'a' and 'b' are added symmetrically on both sides of the non-terminal S, maintaining an odd length. The last production generates the desired 'ab' string with an odd length. By repeatedly applying these productions, the grammar generates strings in which the middle symbol is always 'ab' and the length is always odd.
Context-free grammar for the language { x in {a,b}* | the length of x is odd and its middle symbol is a b }:
S -> a S b | b S a | a b
Learn more about Context-free grammar click here :brainly.com/question/30145712
#SPJ11