13 lines
278 B
Text
13 lines
278 B
Text
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permutation_rec1([X|Y],Z) :-
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permutation_rec1(Y,W),
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select(X,Z,W).
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permutation_rec1([],[]).
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permutation_rec2([], []).
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permutation_rec2([X], [X]) :-!.
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permutation_rec2([T|H], X) :-
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permutation_rec2(H, H1),
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append(L1, L2, H1),
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append(L1, [T], X1),
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append(X1, L2, X).
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