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Find all distinct quadruplets in an array that sum up to a given value

Last updated: 06 February 2023

Given an array arr[] consisting of N integers and an integer K, the task is to print all possible unique quadruplets (arr[i], arr[j], arr[k], arr[l]) whose sum is K such t ...read more

Count distinct emails present in a given array

Last updated: 14 February 2023

Given an array arr[] consisting of N strings where each string represents an email address consisting of English alphabets, '.', '+' and '@', the task is to count the numb ...read more

Technical Scripter 2020

DSA

Count the number of unique characters in a string in Python

Last updated: 23 March 2023

Given a string S consisting of lowercase English alphabets, the task is to find the number of unique characters present in the string.Examples:Input: S = "geeksforgeeks"Ou ...read more

Maximum sum of K-length subarray consisting of same number of distinct elements as the given array

Last updated: 29 December 2022

Given an array arr[] consisting of N integers and an integer K, the task is to find a subarray of size K with maximum sum and count of distinct elements same as that of th ...read more

Difference between std::set and std::list

Last updated: 17 November 2020

Set: Set is a type of associative container which stores elements in a sorted manner. All the elements of a set are unique and can not be modified but can be removed or in ...read more

Maximum MEX from all subarrays of length K

Last updated: 06 July 2022

Given an array arr[] consisting of N distinct integers and an integer K, the task is to find the maximum MEX from all subarrays of length K.The MEX is the smallest positiv ...read more

Largest Sum Contiguous Subarray having unique elements

Last updated: 27 January 2023

Given an array arr[] of N positive integers, the task is to find the subarray having maximum sum among all subarrays having unique elements and print its sum.Input arr[] = ...read more

two-pointer-algorithm

subarray-sum

DSA

Maximize length of the String by concatenating characters from an Array of Strings

Last updated: 22 March 2023

Find the largest possible string of distinct characters formed using a combination of given strings. Any given string has to be chosen completely or not to be chosen at al ...read more

Check if each element of an Array is the Sum of any two elements of another Array

Last updated: 06 June 2021

Given two arrays A[] and B[] consisting of N integers, the task is to check if each element of array B[] can be formed by adding any two elements of array A[]. If it is po ...read more

Number of Positions to partition the string such that atleast m characters with same frequency are present in each substring

Last updated: 10 June 2022

Given a string str of lowercase English alphabets and an integer m. The task is to count how many positions are there in the string such that if you partition the string i ...read more

Operations required to make the string empty

Last updated: 15 September 2022

Given a string str, the task is to make the string empty with the given operation. In a single operation, you can pick some characters of the string (each of the picked ch ...read more

Strings

Java

Thoughtworks

Competitive Programming

HashSet

DSA

Sum of elements whose square root is present in the array

Last updated: 12 September 2022

Given an array arr[], the task is to find the sum of all those elements from the given array whose square root is present in the same array.Examples:Input: arr[] = {1, 2, ...read more

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