cpp-unordered_set

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cpp-unordered_set-functions

20+ articles

unordered_set insert() function in C++ STL

Last Updated: 23 June 2022

The unordered_set::insert() is a built-in function in C++ STL which is used to insert a new {element} in the unordered_set container. Each element is inserted only if it i ...read more

Find total number of distinct years from a string

Last Updated: 05 January 2023

Given a string containing the words and dates, the task is to find the total number of distinct years mentioned in that string.Note: Assuming that the date will be in 'DD- ...read more

unordered_set erase() function in C++ STL

Last Updated: 12 June 2023

The unordered_set::erase() function is a built-in function in C++ STL which is used to remove either a single element or a group of elements ranging from start(inclusive) ...read more

CPP-Functions

C++

cpp-unordered_set

cpp-unordered_set-functions

unordered_set find() function in C++ STL

Last Updated: 27 May 2022

The unordered_set::find() function is a built-in function in C++ STL which is used to search for an element in the container. It returns an iterator to the element, if fou ...read more

CPP-Functions

C++

cpp-unordered_set

cpp-unordered_set-functions

unordered_set count() function in C++ STL

Last Updated: 05 June 2023

The unordered_set::count() function is a built-in function in C++ STL which is used to count occurrences of a particular element in an unordered_set container. As the unor ...read more

CPP-Functions

C++

cpp-unordered_set

cpp-unordered_set-functions

set vs unordered_set in C++ STL

Last Updated: 10 November 2022

Differences : | set | unordered_set---------------------------------------------------------Ordering | increasing order | no order ...read more

Remove Duplicate/Repeated words from String

Last Updated: 19 September 2023

Given a string S, the task is to remove all duplicate/repeated words from the given string.Examples:Input: S = "Geeks for Geeks A Computer Science portal for Geeks"Output: ...read more

Print array elements that are divisible by at-least one other

Last Updated: 17 August 2022

Given an array of length N that contains only integers, the task is to print the special numbers of array. A number in this array is called Special number if it is divisib ...read more

Find the only repetitive element between 1 to N-1

Last Updated: 17 April 2023

Given an array of size N filled with numbers from 1 to N-1 in random order. The array has only one repetitive element. The task is to find the repetitive element.Examples: ...read more

limited-range-elements

cpp-unordered_set

DSA

Difference Between set, multiset, unordered_set, unordered_multiset in C++

Last Updated: 09 November 2022

In C++ Standard Template Library, set, multiset, unordered_set, unordered_multiset are used to store elements. Although they are similar but differ from each other in some ...read more

Unordered Sets in C++ Standard Template Library

Last Updated: 12 June 2023

An unordered_set is an unordered associative container implemented using a hash table where keys are hashed into indices of a hash table so that the insertion is always ra ...read more

STL

C++

cpp-containers-library

cpp-unordered_set

cpp-unordered_set-functions

Subarray with 0 sum

Last Updated: 25 August 2023

Given an array of positive and negative numbers, the task is to find if there is a subarray (of size at least one) with 0 sum.Examples:Input: {4, 2, -3, 1, 6}Output: trueE ...read more

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