Arrays

279+ posts

Last Updated: 15 October 2026

Given an array arr[], partition it into four non-empty contiguous subarrays P, Q, R, and S. Let the sums of these subarrays be W, X, Y, and Z, respectively. Find the minim...read more

Winner in XOR Game of Alternate Moves

Last Updated: 10 October 2026

Given an array arr[] of positive integers, two players take turns removing exactly one element from the array. Before every turn, if the bitwise XOR of all remaining eleme...read more

Last Updated: 03 October 2026

Given an array of integers arr[]. Find the minimum element.Examples:Input: arr[] = [1, 2, 3, 4]Output: 1Explanation: The smallest element in the array is 1.Input: arr[] = ...read more

DSA

Arrays

Check Identical Arrays

Last Updated: 26 September 2026

Given a two integer arrays a[] and b[], return true if both the arrays contain the same elements in the same order. Otherwise, return false. Examples:Input: a[] = [1, 2, 3...read more

DSA

Arrays

Array or List Traversal

Last Updated: 04 October 2026

Given an array arr[] that contains integers. You need to print the elements of the array in a single line with a space between them.Note: Don't add a new line at the end.E...read more

DSA

Arrays

Elements Less Than K

Last Updated: 21 September 2026

Given an array arr[] and an integer k, return all elements of arr that are less than k. The elements in the returned vector should appear in the same order as in the origi...read more

DSA

Arrays

Reverse Order of Rows of a Matrix

Last Updated: 19 September 2026

Given a matrix mat[][] of size n × m, reverse the order of its rows in-place. After the operation, the first row should become the last row, the second row should become ...read more

DSA

Arrays

R-Matrix

Swap All with Next of Next

Last Updated: 19 September 2026

Given an array arr[], swap every ith element of the array with (i+2)th element.Examples:Input: arr[] = [1, 2, 3, 4, 5]Output: [3, 4, 5, 2, 1]Explanation: Swapping 1 and 3,...read more

DSA

Arrays

Sum of Submatrix Elements

Last Updated: 21 September 2026

Given a matrix arr[][] of size n * m and four integers x1, y1, x2, and y2 representing the top-left and bottom-right corners of a submatrix (using 1-based indexing), find ...read more

DSA

Arrays

R-Matrix

Count Occurrences of Each Day of Week

Last Updated: 17 September 2026

Given an integer n representing the number of days beginning from 1st date of a month and an integer k representing the starting day of the month, where 1 denotes Monday, ...read more

DSA

Modular Arithmetic

Arrays

Count n/k Times Occurring

Last Updated: 17 September 2026

Given an array arr[] (may contain duplicates) and a positive integer k, count the number of elements whose occurrence is exactly equal to the size of array arr[] divided b...read more

DSA

Arrays

Minimum Possible Maximum Value in Array After Subtractions

Last Updated: 16 September 2026

Given an array arr[] of n positive integers, you can perform the following operation any number of times:Choose two indices i and j such that arr[i] = arr[j].Replace arr[i...read more

DSA

Arrays

number-theory

Swap Adjacent in Array

Last Updated: 18 October 2026

Given an array arr[] of positive integers, swap the ith element with the (i + 2)th element for every valid i, starting from i = 0 and moving from left to right. Return the...read more

DSA

Arrays

Most Frequent of Two

Last Updated: 10 September 2026

Given an array arr[] and two elements x and y, return the element that occurs more frequently. If both elements have the same frequency, return the smaller one.Examples:In...read more

DSA

Arrays

Multiply Left and Right Array Sums

Last Updated: 08 September 2026

Given an array of integers arr[], divide it into two subarrays left and right such that left contains the first half of the elements and right contains the remaining eleme...read more

DSA

Arrays

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