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Arrays

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Meeting rooms - Find minimum meeting rooms

Last Updated: 26 March 2025

Given two arrays start[] and end[] such that start[i] is the starting time of ith meeting and end[i] is the ending time of ith meeting. Task is to find minimum number of r...read more

Meeting Rooms - Room with Maximum Meetings

Last Updated: 28 April 2025

Given an integernrepresenting the number of rooms numbered from0ton - 1 and a 2D integer arraymeetings[][]wheremeetings[i]=[starti, endi]indicates that a meeting is sch...read more

Missing ranges of numbers

Last Updated: 02 January 2025

You have an inclusive interval [lower, upper] and a sorted array of unique integers arr[], all of which lie within this interval. A number x is considered missing if x is ...read more

Arrays

DSA

Find k smallest elements in an array

Last Updated: 21 November 2024

Given an array arr[] and an integer k, the task is to find k smallest elements in the given array. Elements in the output array can be in any order.Examples:Input: arr[] =...read more

Delete an Element from the Beginning of an Array

Last Updated: 08 November 2024

Given an array of integers, the task is to delete an element from the beginning of the array.Examples:Input: arr[] = [10, 20, 30, 40]Output: [20, 30, 40]Input: arr[] = [20...read more

Arrays

DSA

Delete an Element from the end of an array

Last Updated: 08 November 2024

Given an array of integers, the task is to delete an element from the end of the array.Examples:Input: arr[] = [10, 20, 30, 40]Output: [10, 20, 30]Input: arr[] = [20]Outpu...read more

Arrays

DSA

Delete an Element from a Given Position in an Array

Last Updated: 08 November 2024

Given an array of integers, the task is to delete an element from a given position in the array.Examples:Input: arr[] = [10, 20, 30, 40], pos = 1Output: [20, 30, 40]Input:...read more

Arrays

DSA

Insert Element at a Given Position in an Array

Last Updated: 07 November 2024

Given an array of integers, the task is to insert an element at a given position in the array.Examples:Input: arr[] = [10, 20, 30, 40], pos = 2, ele = 50Output: [10, 50, 2...read more

Arrays

DSA

Insert Element at the End of an Array

Last Updated: 07 November 2024

Given an array of integers, the task is to insert an element at the end of the array.Examples:Input: arr[] = [10, 20, 30, 40], ele = 50Output: [10, 20, 30, 40, 50]Input: a...read more

Arrays

DSA

Insert Element at the Beginning of an Array

Last Updated: 07 November 2024

Given an array of integers, the task is to insert an element at the beginning of the array. Examples:Input: arr[] = [10, 20, 30, 40], ele = 50Output: [50, 10, 20, 30, 40]I...read more

Arrays

DSA

2 Sum - Find All Pairs With Given Sum

Last Updated: 11 October 2024

Given an arrayarr[]and a target value, the task is to find all possible indices (i, j) of pairs (arr[i], arr[j])whose sum is equal to target and i != j. We can return pair...read more

Meeting Rooms - Check if a person can attend all meetings

Last Updated: 26 March 2025

Given an array arr[][] such that arr[i][0] is the starting time of ith meeting and arr[i][1] is the ending time of ith meeting, the task is to check if it is possible for ...read more

Find minimum value of arr[j] + abs(j - i) for all indices

Last Updated: 28 May 2024

Given an array arr[] of size N, the task is for each index i (1≤i≤n) find it's minimum value, that can be calculated by the formula (arr[j] + abs(j−i)), for 0=jn and j != ...read more

Mathematical

Competitive Programming

Two Way Linear Search Algorithm

Last Updated: 15 May 2024

Two-Way Linear Search Algorithm is based on the principle of Linear Search, but the search is conducted from both ends towards the center of the array. In this article, we...read more

Find Common Elements in Two Arrays in Python

Last Updated: 08 May 2024

Given two arrays arr1[] and arr2[], the task is to find all the common elements among them. Examples:Input: arr1[] = {1, 2, 3, 4, 5}, arr2[] = {3, 4, 5, 6, 7}Output: 3 4 5...read more

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