Reducing nearby enemies


You are given an irreflexive symmetric (but not necessarily transitive) “enemies” relation on a set of people.  In other words, if person A is an enemy of a person B, then B is also an enemy of A.  How can you divide up the people into two houses in such a way that every person has at least as many enemies in the other house as in their own house?

Hint:  Planar configuration of straight connecting lines puzzle may provide a hint to solving this puzzle.

Add Comment

  • 0 Answer(s)
  • Your Answer

    By posting your answer, you agree to the privacy policy and terms of service.
  • More puzzles to try-