Q1.Puzzle Q1. How do we measure forty-five minutes using two identical wires, each of which takes an hour to burn? We have matchsticks with us.... read more
Q2.Count ways to reach the nth stairs You have been given a number of stairs. Initially, you are at the 0th stair, and you need to reach the Nt... read more
Q3.Trapping Rain Water Given an M * N matrix, where the value at any cell denotes the height of that cell in a 2-D elevation map. You need to f... read more