cpp-map

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How to insert data in the map of strings?

Last Updated: 14 December 2020

Maps are associative containers that store elements in a specific order. It stores elements in a combination of key values and mapped values ...read more

Strings

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cpp-map

DSA

Vector of Maps in C++ with Examples

Last Updated: 28 July 2022

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

Search by value in a Map in C++

Last Updated: 24 January 2023

Given a set of N pairs as a (key, value) pairs in a map and an integer K, the task is to find all the keys mapped to the given value K. If t ...read more

Advanced Data Structure

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730+ articles

CPP Examples

700+ articles

Calculate the frequency of each word in the given string

Last Updated: 02 March 2023

Given a string str, the task is to find the frequency of each word in a string.Examples:Input: str = "Geeks For Geeks"Output:For 1Geeks 2Exp ...read more

Find the Frequency of Each Element in a Vector in C++

Last Updated: 03 December 2024

The frequency of an element is number of times it occurred in the vector. In this article, we will learn different methods to find the frequ ...read more

How to find the Entry with largest Value in a C++ Map

Last Updated: 16 June 2022

Given a map in C++, the task is to find the entry in this map with the highest value. Examples:Input: Map = {ABC = 10, DEF = 30, XYZ = 20}Ou ...read more

C++

C++ Programs

cpp-map

How to traverse a STL map in reverse direction?

Last Updated: 30 March 2023

Map stores the elements in sorted order of keys. Now if we want to traverse it in reverse order we will use reverse_iterator of map.Syntax:m ...read more

map::lower_bound() in C++ STL

Last Updated: 04 November 2024

In C++,std::map::lower_bound()is a built-in method used to find the first element in the map whose key is either equal to or greater than th ...read more

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map upper_bound() function in C++ STL

Last Updated: 21 April 2025

The map::upper_bound() is a built-in function in C++ STL which returns an iterator pointing to the immediate next element just greater than ...read more

map emplace() in C++ STL

Last Updated: 12 June 2023

The map::emplace() is a built-in function in C++ STL which inserts the key and its element in the map container. It effectively increases th ...read more

set vs map in C++ STL

Last Updated: 10 November 2022

set and map in STL are similar in the sense that they both use Red Black Tree (A self balancing BST). Note that the time complexities of sea ...read more

Last Updated: 14 September 2022

Given a tree and node data, the task to reverse the path to that particular Node.Examples:Input: 7 / \ 6 ...read more

emplace vs insert in C++ STL

Last Updated: 14 June 2022

In C++, all containers (vector, stack, queue, set, map, etc) support both insert and emplace operations.Both are used to add an element in t ...read more

Last Updated: 19 April 2024

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

STL

C++

cpp-map

Different ways to delete elements in std::map (erase() and clear())

Last Updated: 23 December 2023

This article deals with the deletion part of Maps. We can delete elements in std::map using two functions1. Using erase()The erase() is used ...read more

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