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PolarNik [594]
2 years ago
12

Consider a set A = {a1, . . . , an} and a collection B1, B2, . . . , Bm of subsets of A (i.e., Bi ⊆ A for each i). We say that a

set H ⊆ A is a hitting set for the collection B1, B2, . . . , Bm if H contains at least one element from each Bi – that is, if H ∩ Bi is not empty for each i (so H "hits" all the sets of Bi). We define the Hitting Set Problem as follows. We are given a set A = {a1, . . . , an}, a collection B1, B2, . . . , Bm of subsets of A, and an non-negative integer k. We are asked: is there a hitting set H ⊆ A for B1, B2, . . . , Bm so that the size of H is at most k? Prove that the Hitting Set problem is NP-complete
Computers and Technology
1 answer:
Marizza181 [45]2 years ago
3 0

Answer:

Explanation:

This is actually quite straight forward to solve, first lets be mindful of the explanation so with this basis we can tackle future problems.

The solution may very well may be appeared in the accompanying manner:

This solution needs to display that the set H-one can without much of a stretch confirm in polynomial-time if H is of size k and meets every one of the sets B1.....Bm .

We lessen from Vertex Cover.Consider an example of the Vertex-Cover issue chart G=(V,E) and a positive whole number k.We map it to an occurrence of the hitting set issue as follows.The set An is of vertices V.

Also we know that For each edge e has a place with E we have a set Se Consisting of two end-purposes of e.It is anything but difficult to see that a lot of vertices S is a vertex front of G iff the relating components from a hitting set in the hitting set case.

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Given an integer variable strawsOnCamel, write a statement that uses the auto-increment operator to increase the value of that v
Reptile [31]

Answer:

The program to this question can be given as follows:

Program:

#include <stdio.h> //include header file for using basic function

int main() //defining main method

{

int strawsOnCamel=0; //defining integer variable and assign value

for(int i=1;i<=5;i++) //loop for increment integer variable value

{

//code

strawsOnCamel++; //increment value by 1

printf("%d\n", strawsOnCamel); //print value

}

return 0;

}

Output:

1

2

3

4

5

Explanation:

In the C language code above the header file is entered, and a whole variable strawsOnCamel is specified within the main method, which gives a value of 0.

  • Then a for loop is defined inside a loop an integer variable i declared that starts from 1 and ends with 5.
  • Inside a loop, the strawsOnCamel variable is used that increments its value by 1 and prints its value.

5 0
2 years ago
Write a function called sum_scores. It should take four arguments, where each argument is the team's score for that quarter. It
saw5 [17]

Answer:

Here is the Python program which has a function sum_scores:

def sum_scores(score1, score2, score3, score4):

   sum = score1 + score2 + score3 + score4

   print(sum)    

sum_scores(14,7,3,0)

Explanation:

  • Method sum_scores takes four arguments, score1, score2, score3, score4.
  • The sum variable adds these four scores and stores the value of their addition.
  • Lastly print statement is used to print the value stored in sum variable which is the value obtained by adding the four scores.
  • Last statement calls the sum_scores method and passes four values to it which are 14,7,3,0
  • The output of the above program is:
  • 24
  • If you want to use return statement instead of print statement you can replace print(sum) with return sum. But in order to display the sum of the scores you can replace sum_scores(14,7,3,0) with print(sum_scores(14,7,3,0))
  • The program along with the output is attached as a screenshot.

5 0
2 years ago
Which type of utp cable is used to connect a pc to a switch port?
rodikova [14]
HDMI Cable, i think that's what it's called.
3 0
2 years ago
What is the name of the item that supplies the exact or near exact voltage at the required wattage to all of the circuitry insid
gizmo_the_mogwai [7]

Answer:

It's the <u><em>power supply</em></u>

Explanation:

The power supply is what essentially enables the computer to operate. It is able to do that by converting the incoming alternating current (AC) to direct current (DC) at the correct wattage rating that is required by the computer to function. The power supply is a metal box that is generally placed in the corner of the case.

4 0
2 years ago
When checking an id, a server notices a tear in the lamination covering the id, but the other features appear to be valid. the s
KatRina [158]

Answer:

server must ask for a second ID

Explanation:

Based on the information provided within the question it can be said that in this scenario the server must ask for a second ID. If the individual provides a second ID make sure that it is valid. If the individual cannot provide a second ID service can be denied since the ID may have been tampered with since the lamination is coming off.

7 0
2 years ago
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