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Activity Selection Problem in Short

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Activity Selection Problem is used extensively. Suppose a person is given n activities with their start & finish time. Select the maximum number of activities that can be performed by a single person, assuming that a person can only work on a single activity at a time.

Greedy Approach:
  1.  set n equal to the max finish time
  2.  initialize set of selected activity with a1 
  3.  set k=1
  4. loop m=2 to n
  5.    if start time of current activity is greater than the finish time of last activity 
  6.           add the current activity to selected activity
  7.           set k=m

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