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  1. listToNumber(List, Number) :- listToNumber(List, 0, Number).
  2. listToNumber([], X, X).
  3. listToNumber([H | Tail], A, X) :-
  4.         Anew is A * 10 + H,
  5.         listToNumber(Tail, Anew, X).
  6.  
  7. shatter(InList, OutLists) :- 
  8.         length(InList, InL),
  9.         between(1, InL, OutL),
  10.         length(OutLists, OutL),
  11.         append(OutLists, InList),
  12.         forall(member(SubOutLists, OutLists), SubOutLists \= []).
  13.  
  14. split(InList, OutLists) :- 
  15.         shatter(InList, OutLists),
  16.         length(OutLists, 3).
  17.  
  18. isEqual(X) :-
  19.         permutation(X, [1,2,3,4,5,6,7,8,9]),
  20.         split(X, List),
  21.         maplist(listToNumber, List, Y),
  22.         Y = [Multiplicand, Multiplier, Product],
  23.         Product =:= Multiplicand * Multiplier.
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https://ideone.com/cP9f9
language:
Prolog (swi 7.6.4)
created:
15 years ago
visibility:
public

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