The actual data size that can be inserted may be lower due to certain factors such as header information or the need to reserve space for error correction codes or synchronization patterns in practical watermarking systems.
1. Watermarking digital videos is possible and has been widely used for various purposes such as copyright protection, content identification, and authentication. Digital video watermarking techniques embed imperceptible information into video content to mark ownership or provide additional data.
2. Using one-bit LSB (Least Significant Bit) watermarking, the maximum data size that can be inserted in a true color or grayscale image depends on the number of pixels in the image and the number of bits used for each pixel to store the watermark.
3. For an image of dimension 50 * 60 pixels, where each pixel is stored as 3 bytes (true color), the maximum data size that can be inserted in the image using one-bit LSB watermarking can be calculated based on the total number of pixels and the number of bits used for each pixel.
1. Digital video watermarking is a technique used to embed imperceptible information into video content. It involves modifying the video frames by adding or altering some data, such as a digital signature or a logo, without significantly degrading the quality or visual perception of the video. Various watermarking algorithms and methods have been developed to address different requirements and applications. Watermarking enables content creators to protect their intellectual property, track unauthorized use, and authenticate video content.
2. One-bit LSB watermarking is a technique where the least significant bit of each pixel in an image is modified to carry a single bit of information. In true color or grayscale images, each pixel is typically represented by 8 bits (1 byte) for grayscale or 24 bits (3 bytes) for true color (8 bits per color channel). With one-bit LSB watermarking, only the least significant bit of each pixel is altered to store the watermark. Therefore, for a true color image, the maximum data size that can be inserted can be calculated by multiplying the total number of pixels in the image by 1/8 (1 bit = 1/8 byte).
3. In the given image of dimension 50 * 60 pixels, each pixel is stored as 3 bytes (24 bits) since it is a true color image. To calculate the maximum data size that can be inserted using one-bit LSB watermarking, we multiply the total number of pixels (50 * 60 = 3000 pixels) by 1/8 (1 bit = 1/8 byte). Thus, the maximum data size that can be inserted in the image is 3000/8 = 375 bytes.
Learn more about dimension here:- brainly.com/question/31460047
#SP
Consider the following dataset: o vgsales.csv o This dataset contain data of video sales of various publisher, platforms, and genre and it has the following columns Dataset Columns: Column name Description Name The games name Platform Platform of the games release (i.e. PC,PS4, etc.) Year Year of the game's release Genre Genre of the game (ie. Sport, Actions, etc.) Publisher Publisher of the game NA Sales Sales in North America (in millions) EU_Sales Sales in Europe (in millions) JP_Sales Sales in Japan (in millions) Other_Sales Sales in the rest of the world (in millions) Global_Sales Total worldwide sales Instructions: Each team will be required to come with the completed
In the given dataset "vgsales.csv," the columns represent various attributes related to video game sales, including the game's name, platform, year of release, genre, publisher, and sales figures for different regions (North America, Europe, Japan, and the rest of the world), as well as global sales.
Each team is tasked with completing the dataset, presumably by filling in missing values or performing data analysis tasks on the existing data. However, without specific requirements or goals, it is unclear what specific actions are required to consider the dataset completed. Further instructions or objectives would be necessary to provide a more specific solution.
Learn more about data analysis here: brainly.com/question/31086448
#SPJ11
3) Requirements engineering is one important process in software engineering. With aid of a diagram explain this process, showing all the stages involved [10]
Requirements engineering is a systematic process in software engineering that involves gathering, analyzing, documenting, and managing requirements for a software system.
How is this so?The stages of requirements engineering include requirements elicitation, requirements analysis, requirements specification, requirements validation, and requirements management.
These stages are depicted in a diagram where each stage is connected in a sequential manner, representing the flow of activities involved in understanding and defining the needs of stakeholders and translating them into well-defined system requirements.
Learn more about software engineering at:
https://brainly.com/question/7145033
#SPJ4
Assuming narray is an int array, what type of statement is this? auto [v1, v2, v3] = narray: A. multiple array copy B. structured binding declaration C. automatic array initialization D. alias assignment E. None of these
B. structured binding declaration. The statement auto [v1, v2, v3] = narray is a structured binding declaration.
It allows you to bind multiple elements of an array or tuple to individual variables. In this case, the elements of the narray are being assigned to variables v1, v2, and v3.
The auto keyword is used to deduce the type of the variables v1, v2, and v3 from the type of the elements in the narray. This feature was introduced in C++17 to simplify working with structured data.
Option A (multiple array copy) refers to copying the elements of one array to another, which is not happening in this statement.
Option C (automatic array initialization) refers to initializing an array with values without explicitly specifying the size, which is not the case here.
Option D (alias assignment) refers to creating an alias for a variable using the = assignment operator, which is not happening here.
Therefore, the correct answer is B. structured binding declaration.
Learn more about C++ here: brainly.com/question/32331942
#SPJ11
compile a short paragraph about Babbage contribution to the
Field of Computer Architecture.
Charles Babbage, an English mathematician and inventor, made significant contributions to the field of computer architecture. Charles Babbage is renowned for his creation of the Analytical Engine, a mechanical computing device that was designed to perform a wide range of general-purpose computations.
Babbage's vision of the Analytical Engine incorporated key principles such as separate storage and processing units, a control unit for instruction execution, and the concept of conditional branching.
Although the Analytical Engine was never fully realized during Babbage's lifetime, his ideas and designs became instrumental in shaping the future development of computers.
Babbage's contributions to computer architecture have had a profound and lasting impact, inspiring generations of scientists and engineers in the pursuit of technological advancement.
To learn more about computer architecture: https://brainly.com/question/30454471
#SPJ11
Please write C++ functions, class and methods to answer the following question.
Write a function named "createWord" that accepts a word (string) and a
definition (string). It will return the pointer of a newly created Word object
holding that information if they are valid: word and definition cannot be empty or
all blanks. When it is invalid, it will return nullptr to indicate that it cannot create
such Word object.
In C++, functions are a set of instructions that perform a specific task and return a value to the caller. A class is a user-defined data type that contains data members (variables) and member functions (methods) that operate on those data members. In object-oriented programming, classes provide encapsulation, inheritance, and polymorphism.
A class named "Word" is created in the program below, with data members word and definition, and a constructor method to initialize these data members. A method named "validateWord" is created to check if the word and definition are valid or not.
The "createWord" function accepts two strings as parameters, word and definition, and returns a pointer to a new "Word" object. The function first calls the "validateWord" method to check if the word and definition are valid. If they are, it creates a new "Word" object using the "new" keyword and initializes its data members using the constructor method. If they are not valid, the function returns nullptr to indicate that it cannot create a "Word" object.
```c++
#include
#include
using namespace std;
class Word {
public:
string word;
string definition;
Word(string w, string d) {
word = w;
definition = d;
}
};
class Dictionary {
public:
Word* createWord(string word, string definition) {
if (validateWord(word, definition)) {
Word* w = new Word(word, definition);
return w;
}
else {
return nullptr;
}
}
bool validateWord(string word, string definition) {
if (word.empty() || definition.empty()) {
return false;
}
for (char c : word) {
if (!isalpha(c)) {
return false;
}
}
for (char c : definition) {
if (!isalnum(c) && c != ' ') {
return false;
}
}
return true;
}
};
int main() {
Dictionary dict;
string word, definition;
cout << "Enter a word: ";
getline(cin, word);
cout << "Enter a definition: ";
getline(cin, definition);
Word* w = dict.createWord(word, definition);
if (w == nullptr) {
cout << "Invalid word or definition." << endl;
}
else {
cout << "Word: " << w->word << endl;
cout << "Definition: " << w->definition << endl;
}
delete w;
return 0;
}
```
The program uses a class named "Word" to hold the word and its definition and a class named "Dictionary" to create new "Word" objects. The "createWord" function creates a new "Word" object if the word and definition are valid and returns a pointer to it. Otherwise, it returns nullptr to indicate that it cannot create a "Word" object.
To learn more about object-oriented programming, visit:
https://brainly.com/question/31741790
#SPJ11
Create two classes: vehicle and Unmannedvehicle. The class Unmannedvehicle is a subclass that extends the class vehicle. You are also required to write the driver class VehicleInformation, which allows you to test your implementation of vehicle and Unmannedvehicle. The following are implementation details for the classes you need to implement (provided when not self-evident): 1 Vehicle class o Private fields String vehicleName String vehicle Manufacturer int yearBuilt int cost Public class constant field int MINYEARBUILT equals to 1886 (as modern cars were invented in 1886) o getter and setter methods depending on your program design 1 void printinfo() method: Print out the information of the Vehicle, including its name, manufacturer, year built, and cost. An example of the output of this method is as follows: Vehicle Information: Name: RAV4 Manufacturer: Toyota Year built: 2021 Cost: 38000
This is a basic implementation to demonstrate the structure and functionality of the classes. Additional improvements, error handling, and more complex features can be added based on specific requirements.
Here is an example implementation of the requested classes and driver class:
```java
public class Vehicle {
private String vehicleName;
private String vehicleManufacturer;
private int yearBuilt;
private int cost;
public static final int MINYEARBUILT = 1886;
// Constructor
public Vehicle(String vehicleName, String vehicleManufacturer, int yearBuilt, int cost) {
this.vehicleName = vehicleName;
this.vehicleManufacturer = vehicleManufacturer;
this.yearBuilt = yearBuilt;
this.cost = cost;
}
// Getters and setters
public String getVehicleName() {
return vehicleName;
}
public void setVehicleName(String vehicleName) {
this.vehicleName = vehicleName;
}
public String getVehicleManufacturer() {
return vehicleManufacturer;
}
public void setVehicleManufacturer(String vehicleManufacturer) {
this.vehicleManufacturer = vehicleManufacturer;
}
public int getYearBuilt() {
return yearBuilt;
}
public void setYearBuilt(int yearBuilt) {
this.yearBuilt = yearBuilt;
}
public int getCost() {
return cost;
}
public void setCost(int cost) {
this.cost = cost;
}
// Print vehicle information
public void printInfo() {
System.out.println("Vehicle Information:");
System.out.println("Name: " + vehicleName);
System.out.println("Manufacturer: " + vehicleManufacturer);
System.out.println("Year built: " + yearBuilt);
System.out.println("Cost: " + cost);
}
}
public class UnmannedVehicle extends Vehicle {
// Additional fields and methods specific to UnmannedVehicle can be added here
// ...
// Constructor
public UnmannedVehicle(String vehicleName, String vehicleManufacturer, int yearBuilt, int cost) {
super(vehicleName, vehicleManufacturer, yearBuilt, cost);
}
}
public class VehicleInformation {
public static void main(String[] args) {
Vehicle vehicle = new Vehicle("RAV4", "Toyota", 2021, 38000);
vehicle.printInfo();
}
}
```
In this example, the `Vehicle` class represents a vehicle with private fields for `vehicleName`, `vehicleManufacturer`, `yearBuilt`, and `cost`. It also includes getter and setter methods for each field, as well as a `printInfo()` method to display the vehicle's information.
The `UnmannedVehicle` class extends the `Vehicle` class and can have additional fields and methods specific to unmanned vehicles, if needed.
The `VehicleInformation` class serves as the driver class to test the implementation. In the `main` method, a `Vehicle` object is created with specific information and the `printInfo()` method is called to display the vehicle's information.
You can run the `VehicleInformation` class to see the output that matches the example you provided.
Learn more about object-oriented programming here: brainly.com/question/31741790
#SPJ11
Predictor (TAP) component of TAPAS framework for Neural Network (NN) architecture search.
1) TAP predicts the accuracy for a NN architecture by only training for a few epochs and then extrapolating the performance.
2) TAP predicts the accuracy for a NN architecture by not training the candidate network at all on the target dataset.
3) It employs a 2-layered CNN with a single output using softmax.
4) TAP is trained on a subset of experiments from LDE each time a new target dataset is presented for which an architecture search needs to be done.
The correct answer is option 1.
TAP (Predictor) is a component of the TAPAS framework for Neural Network (NN) architecture search. It predicts the accuracy of a NN architecture by only training for a few epochs and then extrapolating the performance.
A neural network (NN) is a computational method modeled after the human brain's neural structure and function. An NN has several layers of artificial neurons, which are nodes that communicate with one another through synapses, which are modeled after biological neurons. The neural network's training algorithm is a method for modifying the connections between artificial neurons to generate a desired output for a given input. Architecture search is a process of automatically discovering optimal neural network architectures for a given task. To address this problem, a framework for neural architecture search called TAPAS is proposed. It utilizes a two-level optimization strategy to iteratively optimize both the network's architecture and its weights. TAP has three components, i.e., Predictor, Sampler, and Evaluator. TAPAS employs a two-layered CNN with a single output using softmax. It is trained on a subset of experiments from LDE each time a new target dataset is presented for which an architecture search needs to be done.
Know more about Neural Network (NN) , here:
https://brainly.com/question/32244902
#SPJ11
Consider the following dataset drawn from AUT student services: M <- matrix(c(10,2,11,7),2,2) dimnames (M) <- list (OS=c("windows", "mac"), major=c("science", "arts")) M ## ## Os ## ## major science arts windows 10 11 mac 2 7 we suspect arts students are more likely to use a mac than science students. State your null clearly r* State the precise definition of p-value • state what "more extreme" means here • use fisher.test(), calculate your pvalue and interpret
The R code performs a hypothesis test to determine if arts students are more likely to use a Mac than science students. The null hypothesis is that there is no significant difference in the proportion of Mac users between majors.
Null hypothesis (H0): There is no significant difference in the proportion of arts students using a Mac compared to science students.
Alternative hypothesis (Ha): Arts students are more likely to use a Mac than science students.
The p-value is the probability of obtaining a test statistic as extreme or more extreme than the observed test statistic, assuming the null hypothesis is true.
"More extreme" in this context means the probability of observing a test statistic as large or larger than the observed test statistic, assuming the null hypothesis is true. For a one-tailed test, the p-value is the probability of obtaining a test statistic as large or larger than the observed test statistic. For a two-tailed test, the p-value is the probability of obtaining a test statistic as extreme or more extreme than the observed test statistic in either direction.
To calculate the p-value using `fisher.test()`, we can use the following code:
```r
# Extract the data for Mac usage by major
mac_data <- M[, "mac"]
arts_mac <- mac_data["arts"]
sci_mac <- mac_data["science"]
# Perform Fisher's exact test
fisher_result <- fisher.test(mac_data)
p_value <- fisher_result$p.value
# Print the p-value and interpretation
cat("P-value =", p_value, "\n")
if (p_value < 0.05) {
cat("Reject the null hypothesis. There is evidence that arts students are more likely to use a Mac than science students.\n")
} else {
cat("Fail to reject the null hypothesis. There is insufficient evidence to conclude that arts students are more likely to use a Mac than science students.\n")
}
To know more about hypothesis test, visit:
brainly.com/question/29996729
#SPJ1
Class Name: Department Problem Description: Create a class for Department and implement all the below listed concepts in your class. Read lecture slides for reference. 1. Data fields Note: These Student objects are the objects from the Student class that you created above. So, you need to work on the Student class before you work on this Department class. • name • Students (array of Student, assume size = 500) • count (total number of Students) Select proper datatypes for these variables. 2. Constructors - create at least 2 constructors • No parameter . With parameter Set name using the constructor with parameter. 3. Methods • To add a new student to this dept • To remove a student from this dept • toString method: To print the details of the department including every Student. • getter methods for each data field • setter method for name • To transfer a student to another dept, i.e. provide a student and a department object • To transfer a student from another dept, i.e. provide a student and a department object Note: A student can be uniquely identified by its student ID 4. Visibility Modifiers: private for data fields and public for methods 5. Write some test cases in main method You also need to create a Word or PDF file that contains: 1. Screen captures of execution for each program, 2. Reflection : Please write at least 300 words or more about what you learned, what challenges you faced, and how you solved it. You can also write about what was most frustrating and what was rewarding. When you write about what you learned, please be specific and list all the new terms or ideas that you learned! Make sure include proper header and comments in your program!!
__str__() method to display the details of the department and students. However, I was able to overcome this challenge by using a list comprehension to convert each student object into a string representation, and then joining these strings with newline characters.
I also faced challenges while implementing the data validation check for adding students to the department. Initially, I had used the len() function to check the length of the students array, but this didn't work as expected because the array is initialized with a fixed size of 500. So instead, I checked the value of the count variable to ensure that it is less than 500 before adding a new student to the array.
Overall, this exercise helped me understand the concept of encapsulation and the importance of data validation. It also reinforced my understanding of classes, objects, constructors, and methods in Python. Additionally, I learned how to write test cases to verify the functionality of my code.
In terms of rewarding aspects, I found that breaking down the problem into smaller components and tackling them one at a time helped me stay organized and make steady progress. The ability to create reusable objects through classes and to encapsulate data and behavior within these objects provides a powerful tool for building complex software systems.
Learn more about method here:
https://brainly.com/question/30076317
#SPJ11
In the HR schema, write a script that uses an anonymous block to include two SQL statements coded as a transaction. These statements should add a product named Metallica Battery which will be priced at $11.99 and Rick Astley Never Gonna Give You Up priced at the default price. Code your block so that the output if successful is ‘New Products Added.’ or if it fails, ‘Product Add Failed.’
The following is the HR SCHEMA to answer the above questions:
COUNTRIES: country_id, country_name, region_id.
DEPARTMENTS: department_id, department_name, location_id.
DEPENDENTS: dependent_id, first_name, last_name, relationship, employee_id.
EMPLOYEES: employee_id, first_name, last_name, email, phone_number, hire_date, job_id, salary, manager_id, department_id.
JOBS: job_id, job_title, min_salary, max_salary.
LOCATIONS: location_id, street_address, postal_code, city, state_province, country_id.
REGIONS: region_id, region_name.
DOWNLOADS: download_id, user_id, download_date, filename, product_id
USERS: user_id, email_address, first_name, last_name
PRODUCTS: product_id, product_name, product_price, add_date
Here is the anonymous block script that adds two products as a transaction and outputs "New Products Added" if successful or "Product Add Failed" if it fails:
DECLARE
v_product_id_1 NUMBER;
v_product_id_2 NUMBER;
BEGIN
SAVEPOINT start_tran;
-- add Metallica Battery product
INSERT INTO PRODUCTS (product_name, product_price)
VALUES ('Metallica Battery', 11.99)
RETURNING product_id INTO v_product_id_1;
-- add Rick Astley Never Gonna Give You Up product
INSERT INTO PRODUCTS (product_name)
VALUES ('Rick Astley Never Gonna Give You Up')
RETURNING product_id INTO v_product_id_2;
IF v_product_id_1 IS NULL OR v_product_id_2 IS NULL THEN
ROLLBACK TO start_tran;
DBMS_OUTPUT.PUT_LINE('Product Add Failed');
ELSE
COMMIT;
DBMS_OUTPUT.PUT_LINE('New Products Added');
END IF;
END;
/
This block uses a SAVEPOINT at the beginning of the transaction to allow us to rollback to the start point in case either of the inserts fail. The RETURNING clause is used to capture the generated product IDs into variables for checking if the inserts were successful. If either of the IDs are null, then we know that an error occurred during the transaction and can rollback to the savepoint and output "Product Add Failed". If both inserts are successful, then we commit the changes and output "New Products Added".
Learn more about block here:
https://brainly.com/question/4915493
#SPJ11
Find all data dependencies using the code below (with forwarding)
loop:
slt $t0, $s1, $s2
beq $t0, $0, end
add $t0, $s3, $s4
lw $t0, 0($t0)
beq $t0, $0, afterif
sw $s0, 0($t0)
addi $s0, $s0, 1
afterif:
addi $s1, $s1, 1
addi $s4, $s4, 4
j loop
end:
Write-after-Write (WAW) dependencies are present in the given code. To identify data dependencies, we need to examine the dependencies between instructions in the code.
Data dependencies occur when an instruction depends on the result of a previous instruction. There are three types of data dependencies: Read-after-Write (RAW), Write-after-Read (WAR), and Write-after-Write (WAW).
Let's analyze the code and identify the data dependencies:
loop:
slt $t0, $s1, $s2 ; No data dependencies
beq $t0, $0, end ; No data dependencies
add $t0, $s3, $s4 ; No data dependencies
lw $t0, 0($t0) ; RAW dependency: $t0 is read before it's written in the previous instruction (add)
beq $t0, $0, afterif ; No data dependencies
sw $s0, 0($t0) ; WAR dependency: $t0 is written before it's read in the previous instruction (lw)
addi $s0, $s0, 1 ; No data dependencies
afterif:
addi $s1, $s1, 1 ; No data dependencies
addi $s4, $s4, 4 ; No data dependencies
j loop ; No data dependencies
end: ; No data dependencies
The data dependencies identified are as follows:
- Read-after-Write (RAW) dependency:
- lw $t0, 0($t0) depends on add $t0, $s3, $s4
- Write-after-Read (WAR) dependency:
- sw $s0, 0($t0) depends on lw $t0, 0($t0)
No Write-after-Write (WAW) dependencies are present in the given code.
To learn more about WAW click here:
brainly.com/question/31558213
#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
Given two integers m & n, we know how to find the decimal representation of m/n to an arbitrary precision. For example, we know that 12345+54321 = 0.227260175622687358480145799966863643894626387584911912520... As it can be noticed, the pattern '9996686' occurs in this decimal expansion. Write a program that aks the user for two positive integers m & n, a pattern of digits as input; and, 1) outputs "Does not exist" if the pattern does not exist in the decimal expansion of m/n 2) outputs the pattern itself along with a digit before and after its first occurrence. Example 1: Input: 12345 54321 9996686 Where: m = 12345, n = 54321, pattern = 9996686 Output: 799966863 Explanation: 9996686 exists in the decimal expansion of 12345/54321 with 7 appearing before it and 3 appearing after it. 12345/54321 = 0.2272601756226873584801457999668636438... Constraints: The pattern will not be longer than 20 digits. The pattern, if exists, should exist within 10000 digits of the decimal expansion. For example: Input Result 12345 54321 91191252001 119125200
Python is a high-level programming language known for its simplicity and readability.
Here is a program written in Python that implements the given requirements:
python
def find_decimal_pattern(m, n, pattern):
decimal_expansion = str(m / n)[2:] # Get the decimal expansion of m/n as a string
if pattern in decimal_expansion:
pattern_index = decimal_expansion.index(pattern) # Find the index of the pattern in the decimal expansion
pattern_length = len(pattern)
if pattern_index > 0:
before_pattern = decimal_expansion[pattern_index - 1] # Get the digit before the pattern
else:
before_pattern = None
if pattern_index + pattern_length < len(decimal_expansion):
after_pattern = decimal_expansion[pattern_index + pattern_length] # Get the digit after the pattern
else:
after_pattern = None
return f"{pattern} exists in the decimal expansion of {m}/{n} with {before_pattern} appearing before it and {after_pattern} appearing after it."
else:
return "Does not exist"
# Example usage
m = int(input("Enter the value of m: "))
n = int(input("Enter the value of n: "))
pattern = input("Enter the pattern of digits: ")
result = find_decimal_pattern(m, n, pattern)
print(result)
Note: The program assumes that the user will input valid positive integers for 'm' and 'n' and a pattern of digits as input. Proper input validation is not implemented in this program.
To learn more about Python visit;
https://brainly.com/question/30391554
#SPJ11
Passwords can be cracked using all but the following technique: Brute force O Steganography O Dictionary Attack O Hybrid Attack 1 p D Question 76 Wireshark, a well known network and security tool, can be used to perform: O Network Troubleshooting O Network Traffic Sniffing Password Captures O All of the above
Passwords cannot be cracked using the technique of Steganography. Steganography is the practice of hiding information within other seemingly innocuous data or media, such as images or audio files.
It does not directly involve cracking passwords.
The other techniques mentioned - Brute force, Dictionary Attack, and Hybrid Attack - are commonly used methods for password cracking.
Regarding the Wireshark tool, it can indeed be used for all the purposes mentioned: Network Troubleshooting, Network Traffic Sniffing, and Password Captures. Wireshark is a powerful network protocol analyzer that allows users to capture and analyze network traffic in real-time. It can be used for various tasks, including network troubleshooting, monitoring network performance, and analyzing security issues.
It can also capture and analyze password-related information exchanged over a network, such as login credentials, making it a valuable tool for password auditing or investigation.
To know more about Steganography related question visit:
https://brainly.com/question/31761061
#SPJ11
Consider the following two atomic formulas:
P(z,x,f(y))P(z,x,f(y)) and P(g(x),b,f(g(a)))P(g(x),b,f(g(a)))
where PP is a 3-ary predicate; ff and gg are unary functions; aa and bb are constants; and x,yx,y and zz are variables.
Identify a most general unifier of the two formulas.
Write your answer as a comma-separated list of substitutions; for example: x/y, y/a, z/f(a)
The most general unifier of the two formulas P(z,x,f(y)) and P(g(x),b,f(g(a))) is z/g(a), x/b, and y/g(a). This means that z is unified with g(a), x is unified with b, and y is unified with g(a).
To find the most general unifier, we look for substitutions that make the two formulas identical. Let's examine the two formulas and find a unifying substitution: Formula 1: P(z,x,f(y))
Formula 2: P(g(x),b,f(g(a)))
We can see that z and g(x) should be unified, x and b should be unified, and y and g(a) should be unified. Therefore, we have the following substitutions: z/g(a) (z is unified with g(a))
x/b (x is unified with b)
y/g(a) (y is unified with g(a))
These substitutions make both formulas identical and unify all variables and constants in the two formulas. So, the most general unifier of the two formulas is z/g(a), x/b, and y/g(a), which indicates that z is unified with g(a), x is unified with b, and y is unified with g(a).
LEARN MORE ABOUT unified here: brainly.com/question/14896027
#SPJ11
11. We can review the values in the TVM registers by simply pressing the key of the value we want to review. (T or F) 12. Values can be entered in the TVM registers in any order. (T or F ) 13. When entering dollar amounts in the PV, PMT, and FV registers, we should enter amounts paid as positive numbers, and amounts received as negative numbers. ( T or F ) 14. Suppose you are entering a negative $300 in the PMT register. Keystrokes are: [−]300 [PMT]. (T or F) 15. If you make a total of ten $50 payments, you should enter $500 in the PMT register. (T or F)
We can review the values in the TVM registers by simply pressing the key .False. Values cannot be entered in the TVM registers in any order. Hence, the answer is as follows:True. False. True. True. True.
When entering dollar amounts in the PV, PMT, and FV registers, we should enter amounts paid as positive numbers, and amounts received as negative numbers.True. Suppose you are entering a negative $300 in the PMT register. Keystrokes are: [−]300 [PMT].15. True. If you make a total of ten $50 payments, you should enter $500 in the PMT register.True. We can review the values in the TVM registers by simply pressing the key of the value we want to review.
False. Values cannot be entered in the TVM registers in any order. TVM refers to time value of money which is a financial concept.13. True. When entering dollar amounts in the PV, PMT, and FV registers, we should enter amounts paid as positive numbers, and amounts received as negative numbers.True. Suppose you are entering a negative $300 in the PMT register. Keystrokes are: [−]300 [PMT]. True. If you make a total of ten $50 payments, you should enter $500 in the PMT register.In total, there are five statements given, each of which is either true or false.
To know more about values visit:
https://brainly.com/question/32720112
#SPJ11
Using Nyquest, derive DS0,T1, using OC1, derive OC1 to OC 768
bit rates
Using the Nyquist theorem, we can derive the bit rates for DS0 and T1 based on the OC1 signal. Additionally, by considering the SONET/SDH hierarchy, we can determine the OC-1 to OC-768 bit rates.
DS0 and T1 Bit Rates:
The Nyquist theorem states that the maximum bit rate of a digital signal is twice the bandwidth of the channel. For DS0, which has a bandwidth of 4 kHz, the maximum bit rate would be 2 * 4,000 = 8,000 bps or 8 kbps. T1, which comprises 24 DS0 channels, has a total bit rate of 24 * 8,000 = 192,000 bps or 192 kbps.
OC-1 to OC-768 Bit Rates:
The SONET/SDH hierarchy defines various Optical Carrier (OC) levels with specific bit rates. Each level is a multiple of the basic OC-1 level. The OC-1 bit rate is 51.84 Mbps, and the higher levels are derived by multiplying this base rate.
Here are the bit rates for OC-1 to OC-768:
OC-1: 51.84 Mbps
OC-3: 3 * OC-1 = 155.52 Mbps
OC-12: 4 * OC-3 = 622.08 Mbps
OC-24: 2 * OC-12 = 1.244 Gbps
OC-48: 4 * OC-12 = 2.488 Gbps
OC-192: 4 * OC-48 = 9.953 Gbps
OC-768: 4 * OC-192 = 39.813 Gbps
Using the Nyquist theorem, we can determine the bit rates for DS0 (8 kbps) and T1 (192 kbps). From there, by considering the SONET/SDH hierarchy, we can derive the bit rates for OC-1 to OC-768.
Learn more about SONET/SDH hierarchy: brainly.com/question/29769791
#SPJ11
In Python Please
6.24 (Functions) LAB: Swapping variables Write a program whose input is two integers and whose output is the two integers swapped. Ex: If the input is 3 8, then the output is 8 3 Your program must define and call the following function. SwapValues returns the two values in swapped order. def SwapValues (userVall, userVal2)
6.24.1: (Functions) LAB: Swapping variables main.py 1 "'' Define your function here. ''' 2 1 name main 3 if 4 TH Type your code here. Your code must call the function. '''|| 0/10 Load default template...
To swap the values of two integers in Python, a program can be written using a function called SwapValues. The program takes two integers as input and returns the swapped values as output.
The SwapValues function is defined and called in the program's main section. When executed, the program prompts the user to enter two integers, passes them to the SwapValues function, and displays the swapped values.
To implement the program, the following steps can be followed:
Define the SwapValues function that takes two parameters, userVal1 and userVal2.
Inside the function, swap the values of userVal1 and userVal2 using a temporary variable.
Return the swapped values.
In the main section of the program, prompt the user to enter two integers.
Call the SwapValues function, passing the user's input as arguments.
Display the swapped values as the output.
Executing this program allows the user to input two integers, and it outputs the values swapped. The SwapValues function ensures that the values are properly swapped.
To know more about swapping variables click here: brainly.com/question/32302104
#SPJ11
The most fundamental type of machine instruction is the instruction that:
O converts data from one type to another
O performs arithmetic operations on the data in the processor
O moves data to and from the processor
O performs logical operations on the data in the processor
The most fundamental type of machine instruction is the instruction that performs arithmetic operations on the data in the processor.
Arithmetic operations, such as addition, subtraction, multiplication, and division, are essential for manipulating and processing data in a computer. These operations are performed directly on the data stored in the processor's registers or memory locations. Arithmetic instructions allow the computer to perform calculations and mathematical operations, enabling it to solve complex problems and perform various tasks. While other types of instructions, such as data conversion, data movement, and logical operations, are also crucial, arithmetic instructions form the foundation for numerical computations and data manipulation in a computer system.
Learn more about machine instructions here: brainly.com/question/31677184
#SPJ11
This is a program written in C. Please don't have a complicated code. It should be simple and straight forward with comments to understand. Also, this is written as an original code instead of copying from somewhere. Thank you in advance. C Review - Base Converter Objectives Write a program that allows a user to convert a number from one base to another. Show a proficiency in: Using gcc to create an executable program Processing ASCII Input and Manipulation of Arrays of Characters Formatted Output Conditionals and Loops Binary Calculations Error Handling Input The program should prompt the user to input a base, b1 from 2 to 20, of the number to be converted, then the base-b1 number itself, first inputting the integer portion, a decimal point (period), and then the fractional part with no spaces. The program should then prompt the user for the new base, b2 from 2 to 30, in which to represent the value. If the input has a non-zero fractional part, the user should be prompted for the number of digits to be used for the new fractional part of the number. For bases greater than 10, alphabetic characters starting with 'A' should be used to represent digits past '9' as is done for hexadecimal numbers. Validation The program should check all input values to make certain that they are valid and give appropriate messages if found to be in error. Output Once all inputs are found to be valid, the program should output the value that was input and its base, b1, and then output the value in the new base system and the new base, b2, along with the number of digits used for the fraction if applicable. For example, FEED.BEEF base 16 equals 1111111011101101.1011111 base 2 to seven decimal places. The program should continue to ask for inputs until the string "quit" is entered which should make the program terminate after saying "Goodbye". Hint: You may find it advantageous to first convert the base b1 number to base 10 and then convert that number to the new b2 base. Use the following line to compile your program: gcc -Wall -g p1.c -o pl The code you submit must compile using the -Wall flag and should have no compiler errors or warnings.
The program written in C is a base converter that allows the user to convert a number from one base to another. It prompts the user to input the base and number to be converted, as well as the new base.
It performs input validation and provides appropriate error messages. The program outputs the original value and base, as well as the converted value in the new base along with the number of fractional digits if applicable. Here is a simple and straightforward implementation of the base converter program in C:
c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main() {
char number[100];
int base1, base2, numDigits;
while (1) {
printf("Enter the number to be converted (or 'quit' to exit): ");
scanf("%s", number);
if (strcmp(number, "quit") == 0) {
printf("Goodbye.\n");
break;
}
printf("Enter the base of the number (2-20): ");
scanf("%d", &base1);
printf("Enter the new base (2-30): ");
scanf("%d", &base2);
if (base2 > 10) {
printf("Enter the number of digits for the fractional part: ");
scanf("%d", &numDigits);
}
// Perform input validation here
// Check if the number and bases are valid and within the specified ranges
// Convert the number from base1 to base10
// Convert the number from base10 to base2
// Output the original value and base
printf("Original number: %s base %d\n", number, base1);
// Output the converted value and base
printf("Converted number: %s base %d to %d decimal places\n", convertedNumber, base2, numDigits);
}
return 0;
}
This program prompts the user for inputs, including the number to be converted, the base of the number, and the new base. It uses a while loop to repeatedly ask for inputs until the user enters "quit" to exit. The program performs input validation to ensure that the inputs are valid and within the specified ranges. It then converts the number from the original base to base 10 and further converts it to the new base. Finally, it outputs the original and converted numbers along with the appropriate messages.
The code provided serves as a basic framework for the base converter program. You can fill in the necessary logic to perform the base conversions and input validation according to the requirements. Remember to compile the program using the provided command to check for any compiler errors or warnings.
Learn more about scanf here:- brainly.com/question/19569210?
#SPJ11
You enter a bakery which sells 5 varieties of cookies. You are going to purchase a
cookie for each of your 12 closest friends.
B.) What if you want to give exactly 4 oatmeal raisin cookies and exactly 5 sugar cookies?
My approach was 12 - 4 - 5 = 3 + 5 - 1 = 7! / 4!
This equation utilizes the form r+n-1/n-1
There are 24 different ways to choose the cookies for the remaining 3 friends when you want to give exactly 4 oatmeal raisin cookies and exactly 5 sugar cookies.
To determine the number of ways to select the cookies for your 12 closest friends, where exactly 4 oatmeal raisin cookies and exactly 5 sugar cookies are chosen, you can use a combination formula.
The total number of cookies to choose for the remaining friends (excluding the 4 oatmeal raisin cookies and 5 sugar cookies) is 12 - 4 - 5 = 3.
To select the remaining cookies, you can use the combination formula:
C(3 + 1, 3) * C(5 + 1, 5) = C(4, 3) * C(6, 5) = 4 * 6 = 24.
Therefore, there are 24 different ways to choose the cookies for the remaining 3 friends when you want to give exactly 4 oatmeal raisin cookies and exactly 5 sugar cookies.
Learn more about exactly here:
https://brainly.com/question/19088999
#SPJ11
Write a function file in MATLAB that calculates activity coefficients for any number of components. The input variables being composition, molar volumes, temperature, and interaction parameters a. The line that defines the function should look more or less like this: function g = wilson (x, a, V, RT) Test your function files for a system consisting of water, acetone and methanol with molar fractions of 0.25, 0.55 and 0.20 respectively at a temperature of 50 °C.
The function file in MATLAB that calculates activity coefficients for any number of components.
The MATLAB codefunction g = wilson(x, a, V, RT)
N = length(x); % Number of components
ln_gamma = zeros(N, 1); % Initialize activity coefficients
for i = 1:N
sum_term = 0;
for j = 1:N
sum_term = sum_term + x(j) * a(i, j);
end
ln_gamma(i) = -log(x(i) + sum_term);
end
g = exp(ln_gamma);
end
% Test the function for water, acetone, and methanol at 50 °C
x = [0.25; 0.55; 0.20];
a = [0 0.044 0.048; 0.044 0 0.048; 0.048 0.048 0];
V = [18; 58; 32]; % Molar volumes in cm^3/mol
R = 8.314; % Universal gas constant in J/(mol K)
T = 50 + 273.15; % Temperature in Kelvin
RT = R * T;
g = wilson(x, a, V, RT);
disp(g);
Read more about MATLAB here:
https://brainly.com/question/13715760
#SPJ4
Given the following list containing several strings, write a function that takes the list as the input argument and returns a dictionary. The dictionary shall use the unique words as the key and how many times they occurred in the list as the value. Print how many times the string "is" has occurred in the list.
lst = ["Your Honours degree is a direct pathway into a PhD or other research degree at Griffith", "A research degree is a postgraduate degree which primarily involves completing a supervised project of original research", "Completing a research program is your opportunity to make a substantial contribution to", "and develop a critical understanding of", "a specific discipline or area of professional practice", "The most common research program is a Doctor of Philosophy", "or PhD which is the highest level of education that can be achieved", "It will also give you the title of Dr"]
The provided Python function takes a list of strings, counts the occurrences of unique words, and returns a dictionary. It can be used to find the number of times the word "is" occurs in the given list of sentences.
Here is a Python function that takes a list of strings as input and returns a dictionary with unique words as keys and their occurrence count as values:
def count_word_occurrences(lst):
word_count = {}
for sentence in lst:
words = sentence.split()
for word in words:
if word in word_count:
word_count[word] += 1
else:
word_count[word] = 1
return word_count
lst = ["Your Honours degree is a direct pathway into a PhD or other research degree at Griffith", "A research degree is a postgraduate degree which primarily involves completing a supervised project of original research", "Completing a research program is your opportunity to make a substantial contribution to", "and develop a critical understanding of", "a specific discipline or area of professional practice", "The most common research program is a Doctor of Philosophy", "or PhD which is the highest level of education that can be achieved", "It will also give you the title of Dr"]
word_occurrences = count_word_occurrences(lst)
print("Number of times 'is' occurred:", word_occurrences.get("is", 0))
This code splits each sentence into words and maintains a dictionary `word_count` to keep track of word occurrences. The function `count_word_occurrences` iterates over each sentence in the input list, splits it into words, and increments the count for each word in the dictionary. Finally, the count for the word "is" is printed using the `get` method of the dictionary.
To know more about dictionary,
https://brainly.com/question/30388703
#SPJ11
What is the runtime complexity (in Big-O Notation) of the following operations for a Hash Map: insertion, removal, and lookup? What is the runtime complexity of the following operations for a Binary Search Tree: insertion, removal, lookup?
The runtime complexity (in Big-O Notation) of the operations for a Hash Map and a Binary Search Tree are as follows:
Hash Map:
Insertion (put operation): O(1) average case, O(n) worst case (when there are many collisions and rehashing is required)
Removal (remove operation): O(1) average case, O(n) worst case (when there are many collisions and rehashing is required)
Lookup (get operation): O(1) average case, O(n) worst case (when there are many collisions and rehashing is required)
Binary Search Tree:
Insertion: O(log n) average case, O(n) worst case (when the tree becomes skewed and resembles a linked list)
Removal: O(log n) average case, O(n) worst case (when the tree becomes skewed and resembles a linked list)
Lookup: O(log n) average case, O(n) worst case (when the tree becomes skewed and resembles a linked list)
It's important to note that the average case complexity for hash map operations assumes a good hash function and a reasonably distributed set of keys. In the worst case, when there are many collisions, the complexity can degrade to O(n), where n is the number of elements in the hash map. Similarly, the average case complexity for binary search tree operations assumes a balanced tree, while the worst-case complexity occurs when the tree becomes heavily unbalanced and resembles a linked list, resulting in O(n) complexity.
Learn more about runtime complexity here:
https://brainly.com/question/30214122
#SPJ11
Answer the following broadly, give examples and illustrate your answer as much as possible:-
a. What are the color matching methods? What are the three basic elements of color?
b. Give examples to illustrate how color affects people's visual and psychological feelings? What can colors be used to express in a map?
c. What are the types of maps? Give examples to illustrate their respective uses?
d. What are the basic map reading elements when using maps? Which do you think is the most important? Why?
The subjective method involves the matching of colors using human vision .
Examples of subjective methods include; visual color matching, matchstick color matching, and comparison of colors.The objective method involves the use of instruments, which measures the color of the sample and matches it to the standard. Examples of objective methods include spectrophotometry, colorimeters, and tristimulus color measurement.The three basic elements of color include; hue, value, and chroma.b. Color Affects on People's Visual and Psychological FeelingsColor affects people's visual and psychological feelings in different ways. For instance, red is known to increase heart rate, while blue has a calming effect.
The color green represents nature and is associated with peacefulness. Yellow is known to stimulate feelings of happiness and excitement. Purple is associated with royalty and luxury, while black represents power.Colors are used in maps to express different information. For example, red is used to depict the boundaries of a county, while green is used to represent public lands. Brown represents land elevations, blue shows water features, while white shows snow and ice-covered areas.c. Types of MapsThere are different types of maps; physical maps, political maps, and thematic maps. Physical maps show the natural features of the Earth, including land elevations, water bodies, and vegetation. Political maps, on the other hand, show administrative boundaries of countries, cities, and towns.
To know more about colors visit:
https://brainly.com/question/23298388
#SPJ11
Which one of the following actions is NOT performed by running mysql_secure_installation a. Set root password b. Remove anonymous user c. Disallow root login remotely d. Remove test database and access to it e. Reload privilege tables now f. Restart MariaDB service
Running mysql_secure_installation does NOT restart the MariaDB service.
It performs several important actions to secure the database.
These actions include setting the root password for the database (option a), removing the anonymous user (option b), disallowing remote root login (option c), removing the test database and access to it (option d), and reloading the privilege tables (option e). These steps help to prevent unauthorized access and secure the database installation.
However, restarting the MariaDB service (option f) is not performed by the mysql_secure_installation script. After running the script, the administrator needs to manually restart the MariaDB service to apply the changes made by the script.
It's worth noting that restarting the service is not a security measure but rather a system administration task to apply configuration changes. The mysql_secure_installation script focuses on security-related actions to harden the MariaDB installation and does not include service restart as part of its functionality
Learn more about SQL Database: brainly.com/question/30173968
#SPJ11
6. (P10.3, Page 316) In the DifficHellman protocol, each participant selects a secret number x and sends the other participant a mod q for some public number a. That is, Alice generates her private key as XA = x and her public key as YA = α" mod 9, and sends her public key to Bob. X a) What would happen if the participants instead formed their public keys as Y₁ = (XÂ)ª and Y₁ = (XB)ª and sent each other these for some public number a? Propose one method Alice and Bob could use to agree on a key. b) Can Darth break your system without finding the private keys XÃ and XÂ?
The proposed alternative method for forming public keys in the Diffie-Hellman protocol is insecure. To ensure secure key exchange, Alice and Bob should use the Diffie-Hellman key exchange protocol.
Darth cannot break the system without obtaining the private keys or finding vulnerabilities in the cryptographic algorithms used.
a) If the participants formed their public keys as Y₁ = (XÂ)ª and Y₁ = (XB)ª and sent them to each other, it would not provide a secure key exchange. An attacker could intercept the public keys and compute the secret key using their own private key, which would compromise the security of the system.
To ensure a secure key exchange, Alice and Bob can use the Diffie-Hellman key exchange protocol. In this protocol, both Alice and Bob agree on a public prime number (q) and a generator (α). They each select a secret number (xA and xB) and compute their respective public keys as YA = (α^xA) mod q and YB = (α^xB) mod q. Then, they exchange their public keys. Finally, they compute the shared secret key as K = (YB^xA) mod q = (YA^xB) mod q.
b) No, Darth cannot break the system without finding the private keys XÃ and XÂ. The security of the system relies on the difficulty of computing the private keys from the exchanged public keys. If Darth does not have the private keys, he cannot compute the shared secret key, which ensures the confidentiality of the communication. However, if Darth manages to obtain the private keys or finds a way to break the cryptographic algorithms used in the protocol, then he could potentially compromise the system's security.
To learn more about Diffie-Hellman key exchange protocol click here: brainly.com/question/32459033
#SPJ11
Choose the incorrect statements and explain the reason. Greedy Algorithms 1 make a choice that looks best at the moment il find complex and locally optimal solution iii. easy to program and get the result quickly iv. sometimes lead to global optimal solutions v. can solve the Coin Changing, LCS, and Knapsack problems
The incorrect statement is: Greedy Algorithms can solve the Coin Changing, LCS, and Knapsack problems.
Greedy algorithms are not guaranteed to solve all optimization problems optimally. While they can provide efficient and locally optimal solutions in some cases, they may fail to find the global optimal solution for certain problems. The statement suggests that greedy algorithms can solve the Coin Changing, LCS (Longest Common Subsequence), and Knapsack problems, which is not always true.
Coin Changing problem: Greedy algorithms can provide an optimal solution for certain cases, such as when the available coin denominations form a "greedy" set (i.e., each coin's value is a multiple of the next coin's value). However, for arbitrary coin denominations, a greedy approach may not give the optimal solution.
Know more about Greedy algorithms here:
https://brainly.com/question/32558770
#SPJ11
in anroid studio java i want 2 jason file with student detalils amd department detalils ,show student details in the first fragment in this fragment we have a button that sends you to the second fragment which has the department detalils and in the seconed fragment there is a button that sends you back to the first fragment
You'll need to create the necessary UI components, parse the JSON files, populate the fragment layouts with data, and handle the navigation between fragments using FragmentTransaction.
To achieve this in Android Studio using Java, you can follow these steps:
Create a new Android project in Android Studio.
Create two JSON files, one for student details and another for department details. You can place these files in the "assets" folder of your Android project.
Design the layout for the first fragment (student details) and the second fragment (department details) using XML layout files.
Create a model class for Student and Department to represent the data from the JSON files. These classes should have fields that match the structure of the JSON data.
In the first fragment, load the student details from the JSON file using a JSON parser (such as Gson or JSONObject). Parse the JSON data into a list of Student objects.
Display the student details in the first fragment's layout by populating the appropriate views with the data from the Student objects.
Add a button to the first fragment's layout and set an onClickListener on it. In the onClickListener, navigate to the second fragment using a FragmentTransaction.
In the second fragment, load the department details from the JSON file using a JSON parser. Parse the JSON data into a list of Department objects.
Display the department details in the second fragment's layout by populating the appropriate views with the data from the Department objects.
Add a button to the second fragment's layout and set an onClickListener on it. In the onClickListener, navigate back to the first fragment using a FragmentTransaction.
Remember to handle any exceptions that may occur during JSON parsing and fragment transactions.
Overall, by following these steps, you'll be able to display student details in the first fragment and department details in the second fragment, with buttons to navigate between the two fragments.
Learn more about Android at: brainly.com/question/32752153
#SPJ11
Write a C program that on the input of a string w consisting of only letters, separates the lowercase and uppercase letters. That is, you have to modify w such that all the lowercase letters are to the left and uppercase letters on the right. The order of the letters need not be retained. The number of comparisons should be at most 2nwherenis the length of string w. Assume that the length of the input string is at most 49. You are not allowed to use any library functions other than strlen and standard input/output. Your program should have only the main()function.
Sample Output
Enter string: dYfJlslTwXKLp
Modified string: dpfwlslTXLKJY
The given C program separates lowercase and uppercase letters in a string. It swaps lowercase letters with preceding uppercase letters, resulting in lowercase letters on the left and uppercase letters on the right.
```c
#include <stdio.h>
#include <string.h>
void separateLetters(char* w) {
int len = strlen(w);
int i, j;
for (i = 0; i < len; i++) {
if (w[i] >= 'a' && w[i] <= 'z') {
for (j = i; j > 0; j--) {
if (w[j - 1] >= 'A' && w[j - 1] <= 'Z') {
char temp = w[j];
w[j] = w[j - 1];
w[j - 1] = temp;
} else {
break;
}
}
}
}
}
int main() {
char w[50];
printf("Enter string: ");
scanf("%s", w);
separateLetters(w);
printf("Modified string: %s\n", w);
return 0;
}
```
Explanation:
The program uses a nested loop to iterate through the string `w`. It checks each character and if it is a lowercase letter, it swaps it with the preceding uppercase letters (if any). This process ensures that all lowercase letters are moved to the left and uppercase letters to the right. Finally, the modified string is printed as the output.
Note: The program assumes that the input string contains only letters and has a maximum length of 49.
know more about C program here: brainly.com/question/30905580
#SPJ11