9 lines
123 B
Plaintext
9 lines
123 B
Plaintext
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edge(1,2).
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edge(2,1).
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edge(1,3).
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path(X,Y) :- edge(X,Y).
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path(X,Y) :- edge(X,Z), path(Z,Y), !.
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cycle(X) :- path(X,X), !.
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