cpp-pair

76 posts

unordered set of Pairs in C++ with Examples

Last Updated: 19 December 2021

What is pair?Utility header in C++ provides us pair container. A pair consists of two data elements or objects.The first element is referenc ...read more

STL

C++

cpp-unordered_set

cpp-pair

2D Vector of Pairs in C++ with Examples

Last Updated: 28 July 2022

What is Vector?In C++, a vector is similar to dynamic arrays with the ability to resize itself automatically. Vector elements are stored in ...read more

cpp-vector

C++

cpp-pair

Implementation of lower_bound() and upper_bound() in Array of Pairs in C++

Last Updated: 01 August 2020

In this article we will discuss the implementation of the lower_bound() and upper_bound() in an array of pairs.lower_bound(): It returns an ...read more

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Sorting a Map by value in C++ STL

Last Updated: 29 December 2022

Maps are associative containers that store elements in a mapped fashion. Each element has a key value and a mapped value. No two mapped valu ...read more

Priority queue of pairs in C++ with ordering by first and second element

Last Updated: 01 November 2023

Priority Queue: Priority queue is the extension of the queue in which elements associated with priority and elements having higher priority ...read more

Implementation of lower_bound() and upper_bound() in Vector of Pairs in C++

Last Updated: 21 July 2022

Here we will discuss the implementation of the lower_bound() and upper_bound() in vector of pairs.lower_bound():It returns an iterator point ...read more

cpp-vector

C++

cpp-pair

Queue of Pairs in C++ STL with Examples

Last Updated: 28 July 2021

Queue in STL are a type of container adaptors which operate in a first in first out (FIFO) type of arrangement where elements are inserted a...read more

Stack of Pair in C++ STL with Examples

Last Updated: 25 March 2020

Stack in STL Stacks are a type of container adaptors with LIFO(Last In First Out) type of working, where a new element is added at one end a...read more

Find K closest elements to given Value in Unsorted Array

Last Updated: 30 April 2024

Given an unsorted array arr[] and two numbers X and K, the task is to find K closest values to X in arr[].Examples:Input: arr[] = {10, 2, 14 ...read more

How to create an unordered_map of pairs in C++?

Last Updated: 26 July 2024

Unordered Map does not contain a hash function for a pair like it has for int, string, etc, So if we want to hash a pair then we have to exp ...read more

Technical Scripter 2018

DSA

Least Frequently Used (LFU) Cache Implementation

Last Updated: 02 January 2025

Design a data structure for the Least Frequently Used (LFU) Cache.LFU (Least Frequently Used) Cache is a caching algorithm where the least f...read more

Sorting an array according to another array using pair in STL

Last Updated: 09 January 2024

We are given two arrays. We need to sort one array according to another. Examples:Input : 2 1 5 4 9 3 6 7 10 8 A B C D E F G H I JOut ...read more

Last Updated: 18 October 2017

Map in STL is used to hash key and value. We generally see map being used for standard data types. We can also use map for pairs.For example ...read more

Last Updated: 25 April 2025

In C++, pair is used to combine together two values that may be of different data types or same data types as a single unit. The first eleme ...read more

STL

C++

cpp-containers-library

cpp-pair

First non-repeating character of given string

Last Updated: 07 April 2025

Given a string s of lowercase English letters, the task is to find the first non-repeating character. If there is no such character, return ...read more

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