Arrays

263+ posts

Last Updated: 07 July 2026

Given n gold boxes, where the i-th box contains a[i] plates and each plate in that box contains b[i] gold coins. A thief can carry at most t plates in total. He may take a...read more

DSA

Arrays

Greedy Algorithms

Minimum Increments To Make Palindrome

Last Updated: 08 July 2026

Given an array of integers arr[] and an integer k. You may freely shuffle the elements of the array and shuffling is not counted as an operation.Find the minimum of number...read more

Last Updated: 03 July 2026

Given two armies, A and B, have the same number of soldiers. The power of their soldiers is given by arr1[] and arr2[], where the i-th soldier of Army A fights only the i-...read more

DSA

Arrays

Drive the Car

Last Updated: 03 July 2026

Given an array arr[] where each element represents the length of a sub-track, and an integer k representing the maximum distance a car can travel on any sub-track.You may ...read more

DSA

Arrays

Distance Travelled in a Permutation of 1 to n

Last Updated: 03 July 2026

Given an array arr[] consisting of a permutation of the set [1, 2, 3, …, n] for some positive integer n. Find the total distance you must travel starting from the position...read more

DSA

HashSet

Arrays

Maximize Distance to Closest Person

Last Updated: 04 July 2026

Given an array arr[] representing a row of seats, where arr[i] = 1 denotes an occupied seat and arr[i] = 0 denotes an empty seat, choose an empty seat such that the distan...read more

DSA

Arrays

two-pointer-algorithm

Meeting rooms - Find minimum meeting rooms

Last Updated: 23 July 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: 17 October 2025

Given an integer n and a 2D array meetings[][], where n represents the number of classrooms numbered from 0 to n - 1, and meetings[i] = [starti, endi] represents a meeting...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

DSA

Arrays

Find k smallest elements in an array

Last Updated: 23 July 2025

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 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

DSA

Arrays

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

DSA

Arrays

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

DSA

Arrays

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

DSA

Arrays

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

DSA

Arrays

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