We have seen in the previous chapters that there are problems of practical interest which are rather diffi cult
to solve. When the problem is known to be NP-Complete (or worse), what can one do? How do we deal with
this intractability of the problem? There are in general two types of approaches that are tried:
1. Search for an algorithm that is guaranteed to give a provably close enough result to the correct solution.
The departure from the correct solution is of such a order that we can safely ignore it for the application
that we have in mind.
2. Alternatively, try for an algorithm ...
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