Problem

Show that for any integer n that is a power of 2, there is an instance of the set cover pr...

Show that for any integer n that is a power of 2, there is an instance of the set cover problem (Section 5.4) with the following properties:

  i. There are n elements in the base set.


  ii. The optimal cover uses just two sets.


  iii. The greedy algorithm picks at least log n sets.

Thus the approximation ratio we derived in the chapter is tight.

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Solutions For Problems in Chapter 5