You've been given a month's pass on Sky High Airlines, a new
carrier servicing the 23 cities on the map below. Your pass
entitles you to visit as many of these cities as you wish during
the next 30 days-but you cannot return to a city in which you
have previously stopped. How can you plan your trip to include
every city on Sky High's schedule, taking off from Boston, and
making a final landing in Los Angeles?
ANSWER:
You should proceed as follows.
Boston, Buffalo, Detroit, Minneapolis, Helena, Seattle, San Francisco,
Salt Lake City, Chicago, Indianapolis, Cincinnati,
Charleston, New York, Washington, Atlanta, New Orleans, Houston, El Paso, Memphis, Albuquerque,
Denver, Las Vegas, Los Angeles.