cpp-priority-queue

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Priority Queue of Vectors in C++ STL with Examples

Last Updated: 17 March 2020

Priority Queue in STL Priority queues are a type of container adapters, specifically designed such that the first element of the queue is the greatest of all elements in t ...read more

K’th Least Element in a Min-Heap

Last Updated: 19 April 2023

Given a min-heap of size n, find the kth least element in the min-heap.Examples:Input : {10, 50, 40, 75, 60, 65, 45} k = 4Output : 50Input : {10, 50, 40, 75, 60, 65, 45} k ...read more

Technical Scripter 2018

DSA

Priority queue of pairs in C++ (Ordered by first)

Last Updated: 04 October 2018

In C++, priority_queue implements heap. Below are some examples of creating priority queue of pair type.Max Priority queue (Or Max heap) ordered by first element[sourceco ...read more

Merge k sorted arrays | Set 2 (Different Sized Arrays)

Last Updated: 10 July 2023

Given k sorted arrays of possibly different sizes, merge them and print the sorted output.Examples:Input: k = 3 arr[][] = { {1, 3}, {2, 4, 6}, ...read more

STL Priority Queue for Structure or Class

Last Updated: 01 June 2022

STL priority_queue is the implementation of Heap Data-structure. By default, it's a max heap and we can easily use it for primitive datatypes. There are some important app ...read more

STL

C++

cpp-priority-queue

Minimum increment/decrement to make array non-Increasing

Last Updated: 16 February 2023

Given an array a, your task is to convert it into a non-increasing form such that we can either increment or decrement the array value by 1 in the minimum changes possible ...read more

priority_queue::push() and priority_queue::pop() in C++ STL

Last Updated: 14 June 2022

Priority queues are a type of container adaptors, specifically designed such that the first element of the queue is either the greatest or the smallest of all elements in ...read more

Prim's algorithm using priority_queue in STL

Last Updated: 26 February 2023

Given an undirected, connected and weighted graph, find Minimum Spanning Tree (MST) of the graph using Prim's algorithm.Input : Adjacency List representation of abo ...read more

Dijkstra's Shortest Path Algorithm using priority_queue of STL

Last Updated: 03 August 2023

Given a graph and a source vertex in graph, find shortest paths from source to all vertices in the given graph.Input : Source = 0Output : Vertex Distance from Sourc ...read more

How to implement Min Heap using STL?

Last Updated: 10 January 2023

In C++ STL, there is priority_queue that can directly be used to implement Max Heap. In order to fully understand the code, make sure you are familiar with following conce ...read more

STL

C++

cpp-priority-queue

Priority Queue in C++ Standard Template Library (STL)

Last Updated: 13 July 2023

A C++ priority queue is a type of container adapter, specifically designed such that the first element of the queue is either the greatest or the smallest of all elements ...read more

STL

C++

cpp-containers-library

cpp-priority-queue

Sort a nearly sorted (or K sorted) array

Last Updated: 12 April 2023

Given an array of N elements, where each element is at most K away from its target position, devise an algorithm that sorts in O(N log K) time.Examples:Input: arr[] = {6, ...read more

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