TopPilot airlines is committed to customer service and convenience. Thus, it is not simply enough to have a flight from San Francisco, CA to Hartford, CT. There must be a direct flight.
You will be given a String representing one-way flight paths. For each element in the String, the element index is the departure airport number (0-indexed, so the first element is airport 0) and the element is a comma-delimited list of airport numbers to which there is a direct flight from the departure airport.
Write a method that, given these one-way flight paths, adds direct one-way flights between airports that are currently connected by non-direct one-way flights. For example, if there is a direct flight from SFO to JFK and a direct flight from JFK to LAX, and not a direct flight from SFO to LAX, then add a direct flight from SFO to LAX. Do not, however, add a direct flight from an airport to itself, even if a loop exists. Once this is done, the method should return the total number of flights provided by TopPilot airlines.
|-||If the destination airport does not appear as an element in destinations (which is always the case when it is greater than 19), there are no departing flights from that airport.|
|-||Leading zeroes in the numbers are allowed.|
|-||No airport will have a direct flight to itself.|
|-||destinations will have between 1 and 20 elements, inclusive.|
|-||each element of destinations will contain only the characters '0' through '9', and commas ','.|
|-||each element of destinations will be a comma delimited list of integers, with no numbers repeated, and no leading, trailing, or extra commas.|
|-||each element of destinations will be contain between 1 and 50 characters, inclusive.|
|-||destination airport numbers will be between 0 and 50, inclusive.|