Finished J as far as I can tell
lol wasn't done before. Removed making destination city visited when you get there. Fixed the issue of not reporting multiple ones/finding one when the first fails.
Removed visiting cities. Now ends whenever the flight can't travel
anymore that day. Also modified time to support subtracting times that
span multiple days. Shit I forgot to remove visited as a variable even
though it doesn't matter for the code anymore.
removed variable visited entirely
Fixed conflicts between Flight.cpp Flight.h graph.cpp graph.h
Fixed more merge errors
remove unneeded print statements
fix conflicts