Majority Element II — Divide and Conquer Approach

Problem Description:

Given an array arr[] consisting of N integers, the task is to find all the array elements which occurs more than floor (n/3) times.

Input: arr[] = {5, 3, 5}
Output: 5…

Absolute value Array Sort

Problem Statement:
Given an array of integers arr, write a function absSort(arr), that sorts the array according to the absolute values of the numbers in arr. If two numbers have the same absolute value, sort them according to sign, where the negative numbers come before the…

Surrounded Regions-Leetcode 130

Problem Statement: Given an m x n matrix board containing 'X' and 'O', capture all regions that are…

Reverse Linked List in Groups of Size K

Problem Statement: Given a linked list, reverse the nodes of a linked list k at a time and return its modified list.

k is a positive integer and is less than or equal to the length of the linked list. If the number of nodes is not a…

Isomorphic String

Problem Statement:

Given two strings s and t, determine if they are isomorphic.

Two strings s and t are isomorphic if the characters in s can be replaced to get t.

All occurrences of a character must be replaced with…