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Apr 26th, 2017
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Prolog 0.20 KB | None | 0 0
  1. diff([],[]).
  2. diff([_],[]).
  3.  
  4. even(X) :-Y is mod(X,2), Y =:= 0.
  5. diff([A,B|Tail],[Diff|DiffTail]):- even(B), even(A), Diff is B-A, diff(Tail,DiffTail).
  6. diff([_,_|Tail],DiffTail):- diff(Tail,DiffTail).
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