Q1.Trapping Rain Water You have been given a long type array/list 'ARR' of size 'N'. It represents an elevation map wherein 'ARR[i]' denotes th... read more
Q2.Stock Buy and Sell You have been given an array 'PRICES' consisting of 'N' integers where PRICES[i] denotes the price of a given stock on th... read more
Q3.Reverse Linked List You are given a Singly Linked List of integers. You need to reverse the Linked List by changing the links between nodes.... read more