1.In speaking of complexity, when we say a problem is hard, wemean
it takes polynomial time to solve
It has no tight bound
it takes exponential time to solve
No one knows how to find the answer
2.The object of the Kevin Bacon game is to link a movie actor toKevin Bacon via shared movied roles. The minimum number of links isan actor’s Bacon number. For instance, Tom Hanks has a Bacon numberof 1 as he was in Apollo 13 with Kevin Bacon. Sally Field has aBacon number of 2, because she was in Forrest Gump with Tom Hankswho was in Apollo 13 with Kevin
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