The Bellman-Ford algorithm for the shortest path problem with negative edge weights will report that there exists a negative cycle if at least one edge can still be relaxed after performing nm times of relaxations. The algorithm, however, does not specify which cycle is a negative cycle. Design an algorithm to report one such cycle if it exists. You should make your algorithm runs as fast as possible.

Answers

Answer 1

Answer:

- Iterate over the Bellman-Ford algorithm n-1 time while tracking the parent vertex and store in an array.

- Do another iteration and if no relaxation of the edges occurs in the nth iteration then print of return "There are no negative cycle".

- Else, store the vertex of the relaxed edge at the nth iteration with a variable name.

- Then iterate over the vertexes starting from the store vertex until a cycle is found then print it out as the cycle of negative weight.

Explanation:

The Bellman-Ford algorithm can be used to detect a negative cycle in a graph. The program should iterate over the algorithm, in search of a relaxed edge. If any, the vertex of the specified edge is used as a starting point to get the target negative cycle.


Related Questions

A video game character can face one of four directions

Answers

Really
I didn’t know that:)

What line of code makes the character pointer studentPointer point to the character variable userStudent?char userStudent = 'S';char* studentPointer;

Answers

Answer:

char* studentPointer = &userStudent;

Explanation:

Pointers in C are variables used to point to the location of another variable. To declare pointer, the data type must be specified (same as the variable it is pointing to), followed by an asterisk and then the name of the pointer. The reference of the target variable is also assigned to the pointer to allow direct changes from the pointer variable.

3. Write a function named sum_of_squares_until that takes one integer as its argument. I will call the argument no_more_than. The function will add up the squares of consecutive integers starting with 1 and stopping when adding one more would make the total go over the no_more_than number provided. The function will RETURN the sum of the squares of those first n integers so long as that sum is less than the limit given by the argument

Answers

Answer:

Following are the program to this question:

def sum_of_squares(no_more_than):#defining a method sum_of_squares that accepts a variable

   i = 1#defining integer variable  

   t = 0#defining integer variable

   while(t+i**2 <= no_more_than):#defining a while loop that checks t+i square value less than equal to parameter value  

       t= t+ i**2#use t variable to add value

       i += 1#increment the value of i by 1

   return t#return t variable value

print(sum_of_squares(12))#defining print method to call sum_of_squares method and print its return value

Output:

5

Explanation:

In the program code, a method "sum_of_squares" is declared, which accepts an integer variable "no_more_than" in its parameter, inside the method, two integer variable "i and t" are declared, in which "i" hold a value 1, and "t" hold a value that is 0.

In the next step, a while loop has defined, that square and add integer value and check its value less than equal to the parameter value, in the loop it checks the value and returns t variable value.

Any one know??please let me know

Answers

Answer:

B

Explanation:

Answer:

The answer is B.

Explanation:

Also I see your using schoology, I use it too.

what types of problems if no antivirus is not installed

Answers

If you meant what would happen if you don't install an antivirus software, trust me, you don't want to know. I'd definitely recommend either Webroot (I believe that's how it's spelled) or Mcafee.

A series of gentle often open-ended inquiries that allow the client to progressively examine the assumptions and interpretations here she is made about the victimization experience is called:_____.

Answers

Answer:

Trauma Narrative

Explanation:

Given that Trauma narrative is a form of narrative or carefully designed strategy often used by psychologists to assists the survivors of trauma to understand the meaning or realization of their experiences. It is at the same time serves as a form of openness to recollections or memories considered to be painful.

Hence, A series of gentle often open-ended inquiries that allow the client to progressively examine the assumptions and interpretations he or she is made about the victimization experience is called TRAUMA NARRATIVE

Generally speaking, digital marketing targets any digital device and uses it to advertise and sell a(n) _____.


religion

product or service

governmental policy

idea

Answers

Answer:

product or service

Explanation:

Digital marketing is a type of marketing that uses the internet and digital media for the promotional purposes. It is a new form of marketing where the products are not physically present. The products and services are digitally advertised and are used for the popularity and promotion. Internet and digital space are involved in the promotion. Social media, mobile applications and websites are used for the purpose.

Answer:

A.) Product or service

Explanation:

Digital marketing is the practice of promoting products or services through digital channels, such as websites, search engines, social media, email, and mobile apps. The goal of digital marketing is to reach and engage with potential customers and ultimately to drive sales of a product or service. It can target any digital device that can access the internet, and it can use a variety of techniques such as search engine optimization, pay-per-click advertising, social media marketing, content marketing, and email marketing to achieve its objectives.

Pointers are addresses and have a numerical value. You can print out the value of a pointer as cout << (unsigned)(p). Write a program to compare p, p + 1, q, and q + 1, where p is an int* and q is a double*. Explain the results.

Answers

Answer:

#include <iostream>

using namespace std;

int main() {

  int i = 2;

  double j = 3;

 

  int *p = &i;

  double *q = &j;

 

  cout << "p = " << p << ", p+1 = " << p+1 << endl;

  cout << "q = " << q << ", q+1 = " << q+1 << endl;

  return 0;

}

Explanation:

In C++, pointers are variables or data types that hold the location of another variable in memory. It is denoted by asterisks in between the data type and pointer name during declaration.

The C++ source code above defines two pointers, "p" which is an integer pointer and "q", a double. The reference of the variables i and j are assigned to p and q respectively and the out of the pointers are the location of the i and j values in memory.

Which interpersonal skill is the most important for a telecom technician to develop?
teamwork
active listening
conflict resolution
social awareness

Answers

Answer: Interpersonal communication is the process of face-to-face exchange of thoughts, ideas, feelings and emotions between two or more people. This includes both verbal and nonverbal elements of personal interaction.

Explanation:

i think plz dont be mad

Which of the following is NOT true?

a. The process provides the macro steps
b. Methodologies provide micro steps that never transcends the macro steps.
c. Methodologies provide micro steps that sometimes may transcend the macro steps.
d. A methodology is a prescribed set of steps to accomplish a task.

Answers

Answer:

b. Methodologies provide micro-steps that never transcends the macro steps.

Explanation:

Methodologies are a series of methods, processes, or steps in completing or executing a project. Projects can be divided into macro steps or processes and these macro steps can be divided into several micro-steps. This means that, in methodology, micro-steps always transcends to a macro-step.

Suppose an application generates chunks 60 bytes of data every 200msec. Assume that each chunk gets put into a TCP packet (using a standard header with no options) and that the TCP packet gets put into an IP packets. What is the % of overhead that is added in because of TCP and IP combines?
1) 40%
2) 10%
3) 20%
4) 70%

Answers

Answer:

1) 40%

Explanation:

Given the data size = 60 byte

data traversed through TSP then IP

Header size of TCP = 20 bytes to 60 bytes

Header size of IP = 20 bytes to 60 bytes

Calculating overhead:

By default minimum header size is taken into consideration hence TCP header size = 20 bytes and IP header size = 20 bytes

Hence, the correct answer is option 1 = 40%

Write a SELECT statement that returns these columns from the Customers table:
Customer last name customer_last name column
City customer_city column
Zip code customer_zip Column
Return only the rows with customer_state equal to IL .
Sort the results in Descending order of customer last name
SCHEMA:
CREATE TABLE customers
(
customer_id INT NOT NULL,
customer_last_name VARCHAR(30),
customer_first_name VARCHAR(30),
customer_address VARCHAR(60),
customer_city VARCHAR(15),
customer_state VARCHAR(15),
customer_zip VARCHAR(10),
customer_phone VARCHAR(24)
);
INSERT INTO customers VALUES
(1, 'Anders', 'Maria', '345 Winchell Pl', 'Anderson', 'IN', '46014', '(765) 555-7878'),
(2, 'Trujillo', 'Ana', '1298 E Smathers St', 'Benton', 'AR', '72018', '(501) 555-7733'),
(3, 'Moreno', 'Antonio', '6925 N Parkland Ave', 'Puyallup', 'WA', '98373', '(253) 555-8332'),
(4, 'Hardy', 'Thomas', '83 d''Urberville Ln', 'Casterbridge', 'GA', '31209', '(478) 555-1139'),
(5, 'Berglund', 'Christina', '22717 E 73rd Ave', 'Dubuque', 'IA', '52004', '(319) 555-1139'),
(6, 'Moos', 'Hanna', '1778 N Bovine Ave', 'Peoria', 'IL', '61638', '(309) 555-8755'),
(7, 'Citeaux', 'Fred', '1234 Main St', 'Normal', 'IL', '61761', '(309) 555-1914'),
(8, 'Summer', 'Martin', '1877 Ete Ct', 'Frogtown', 'LA', '70563', '(337) 555-9441'),
(9, 'Lebihan', 'Laurence', '717 E Michigan Ave', 'Chicago', 'IL', '60611', '(312) 555-9441'),
(10, 'Lincoln', 'Elizabeth', '4562 Rt 78 E', 'Vancouver', 'WA', '98684', '(360) 555-2680');

Answers

Answer:

SELECT customer_last_name, customer_city, customer_zip FROM customers WHERE customer_state = 'IL' ORDER BY customer_last_name DESC;

Explanation:

Here, we are given a SCHEMA with the table name customers.

It's creation command and commands to insert values are also given.

We have to print the customer last name, city and zip code of all the customers who have their state as IL in the decreasing order of their last names.

Let us learn a few concepts first.

1. To print only a specified number of columns:

We can write the column names to be printed after the SELECT command.

2. To print results as per a condition:

We can use WHERE clause for this purpose.

3. To print in descending order:

We can use ORDER BY clause with the option DESC to fulfill the purpose.

Therefore, the answer to our problem is:

SELECT customer_last_name, customer_city, customer_zip FROM customers WHERE customer_state = 'IL' ORDER BY customer_last_name DESC;

Output of the command is also attached as screenshot in the answer area.

What dd command would you use to copy the contents of a partition named /dev/drive1 to another partition, called /dev/backup?

Answers

Answer:

dd if=/dev/drive1 of=/dev/backup

Explanation:

Linux operating system is an open-source computer application readily available to system operators. The terminal is a platform in the operating system used to write scripts like bash and directly communicate with the system kernel.

There are two commands used in bash to copy files, the "cp" and "dd". The dd is mostly used to copy files from one storage or partition to another. The syntax of dd is;

dd if= (source partition/directory) of= (target partition/directory)

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