It is a good idea to explore this problem by starting with
some graphs that you know WILL result in the formation of 
two teams, and tracing through some of the BFS and DFS uses
we saw in class to look for a pattern in the numbers that
are assigned to each vertex.

For example, this set of cards should allow for the creation 
of two teams:
	TonyStark doesn't like SteveRogers
	SteveRogers doesn't like BenFromAccounting
	SteveTrevor doesn't like TonyStark
	SteveRogers doesn't like Gamora
	SteveTrevor doesn't like Gamora
	Gamora doesn't like SteveTheIntern
	Nebula doesn't like Gamora