Parking Lot System

Design a parking lot system that can track the availability of parking spaces based on arrival and departure events. You will receive a series of events where each event is either an arrival or a departure, along with the ID of the vehicle. Use a min-heap to track the available spaces and ensure that when a vehicle departs, that space becomes available again. The first line contains the number of parking spaces. Subsequent lines will contain events in the format 'arrive <vehicle_id>' or 'depart <vehicle_id>'. Output the ID of the vehicle that has departed once the departure event is processed. If a vehicle arrives but there are no spaces, print 'No available space'. The last input line contains a '-' to signal the end of inputs. Example: Input: 5 arrive 101 depart 101 arrive 102 - Output: 101