Avalara Problem (Coding Round) | SDE | September 2020

Problem 2, 4, 5 were asked exactly same from this link http://thejoboverflow.com/p/p111/! The only extra problem asked was Light House as posted below. Light House Problem Country X is surrounded by oceans. One day there is a forecast for a cyclone by weather agencies, its red alert for the whole country. All the beaches have been sealed. There are N lighthouses forming a straight line around the coast area and the government wants to check the range of a lighthouse ...