Question

In: Computer Science

Building a Priority Queue in C++ using a min-heap. Not using C++ Standard Template Library. Trying...

Building a Priority Queue in C++ using a min-heap.

Not using C++ Standard Template Library.

Trying to understand how this works. Thank you

Expert Solution

`Hey,

Note: Brother if you have any queries related the answer please do comment. I would be very happy to resolve all your queries.

#include <bits/stdc++.h>

using namespace std;

// Driver code

int main ()

{

// Creates a min heap

priority_queue <int, vector<int>, greater<int> > pq;

pq.push(5);

pq.push(1);

pq.push(10);

pq.push(30);

pq.push(20);

// One by one extract items from min heap

while (pq.empty() == false)

{

cout << pq.top() << " ";

pq.pop();

}

return 0;

}

Kindly revert for any queries

Thanks.

venereology answered 8 months ago

Language C++ Implement a Priority Queue with a Binary HEAP. Use a Max Heap. Create a...

Language C++ Implement a Priority Queue with a Binary HEAP. Use a Max Heap. Create a class called Node: Have a Name and Priority.Data set - 10 is the highest priority, 1 is lowest priority. Enqueue and dequeue in the following order. Function Name, Priority Enqueue Joe, 3 Enqueue Fred,1 Enqueue Tuyet,9 Enqueue Jose, 6 Dequeue Enqueue Jing, 2 Enqueue Xi, 5 Enqueue Moe, 3 DequeueEnqueue Miko, 7 Enqueue Vlady, 8 Enqueue Frank, 9 Enqueue Anny, 3 DequeueEnqueue Xi, 2 Enqueue Wali, 2 Enqueue xChe, 6 Enqueue xVerra, 8 Dequeue Dequeue Dequeue Dequeue...

How to write a max-heap implementation of a templated priority queue class using the STL std::vector...

How to write a max-heap implementation of a templated priority queue class using the STL std::vector class to hold the data array

A max-heap can be used as a max-priority queue, which is an abstract data type having...

A max-heap can be used as a max-priority queue, which is an abstract data type having the operations Insert, Maximum, Extract-Max, and Increase-Key. a. Describe how to implement a FIFO queue with a priority queue, and analyze the time complexity of the implementation (Insert and Delete operations), assuming that a heap is used for the priority queue. b. Describe how to implement a LIFO queue (i.e. a stack) with a priority queue, and analyze the time complexity of the implementation...

One way to remove an object from a binary min heap is to decrease its priority...

One way to remove an object from a binary min heap is to decrease its priority value by 1 and then call deleteMin. An alternative is to remove it from the heap, thus creating a hole, and then repair the heap. Write pseudocode for an algorithm that performs the remove operation using the alternative approach described above. Your pseudocode should implement the method call remove (int index), where index is the index into the heap array for the object to...

Implement a priority queue using a DoublyLinkedList where the node with the highest priority (key) is...

Implement a priority queue using a DoublyLinkedList where the node with the highest priority (key) is the right-most node. The remove (de-queue) operation returns the node with the highest priority (key). If displayForward() displays List (first-->last) : 10 30 40 55 remove() would return the node with key 55. Demonstrate by inserting keys at random, displayForward(), call remove then displayForward() again. You will then attach a modified DoublyLinkedList.java (to contain the new priorityInsert(long key) and priorityRemove() methods). Use the provided...

#include <iostream> #include <queue> //This contains the STL's efficient implementation of a priority queue using a...

#include <iostream> #include <queue> //This contains the STL's efficient implementation of a priority queue using a heap using namespace std; /* In this lab you will implement a data structure that supports 2 primary operations: - insert a new item - remove and return the smallest item A data structure that supports these two operations is called a "priority queue". There are many ways to implement a priority queue, with differernt efficiencies for the two primary operations. For this lab,...

write C program to implement the priority queue with the operation insert

C++ Program 2–Implement a Priority queue using a SORTED list. Use Quicksort after adding a new...

C++ Program 2–Implement a Priority queue using a SORTED list. Use Quicksort after adding a new node.Example of quick sort below. Adopt to your program. #include <iostream> voidquickSort(inta[], intfirst, intlast); intpivot(inta[], intfirst, intlast); voidswap(int& a, int& b); voidswapNoTemp(int& a, int& b); voidprint(intarray[], constint& N); usingnamespacestd; intmain() { inttest[] = { 7, -13, 1, 3, 10, 5, 2, 4 }; intN = sizeof(test)/sizeof(int); cout << "Size of test array :"<< N << endl; cout << "Before sorting : "<< endl; print(test,...

C++ Program 1–Implement a Priority Queue(PQ) using an UNSORTED LIST. Use an array size of 10...

C++ Program 1–Implement a Priority Queue(PQ) using an UNSORTED LIST. Use an array size of 10 elements. Use a circular array: Next index after last index is 0. Add the new node to next available index in the array. When you add an element, add 1 to index (hit max index, go to index 0). Test if array in full before you add. When you remove an element, from the list, move the following elements to the left to fill...

Write a C program to implement the priority queue with the operations insert and extractmax. Sample...

Write a C program to implement the priority queue with the operations insert and extractmax. Sample : ====Menu==== insert extractmax display exit Enter your choice: 1 Input a number: 2 enter any key to go to main menu ====Menu==== insert extractmax display exit Enter your choice: 1 Input a number: 4 enter any key to go to main menu ====Menu==== insert extractmax display exit Enter your choice: 1 Input a number: 6 enter any key to go to main menu...