This is my test data:

@a_list = (
  [1,2], [1,3], [1,4], [1,5],
  [2,3], [2,4],
  [3,4],
  [5,6], [5,7], [5,9],
  [6,9],
  [7,8],
  [8,9],
 );

[download]

... and here are my expected results:

1 2 3
1 2 4
1 3 4
2 3 4
5 6 9

[download]

Shamelessly copied from the the pod of Graph::Clique

I am a bit hesitant to pursue Graph::Clique due to the warning on large result sets. I expect cliques of hundreds of members, if not thousands. Some simplifications or "way to define the problem" may reduce computational difficulty many fold while in no way compromising the problem. Let me think about it. If any interest, I will get back - no guarantees on how good the solution will be!

In reply to Re^2: Sub set where all are connected by Sanjay
in thread Sub set where all are connected by Sanjay

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