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Ingy döt Net 2013-04-10 12:38:42 -07:00
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Task/Ackermann-function/Prolog/ackermann-function.pro Normal file
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ack(0, N, Ans) :- Ans is N+1.
ack(M, 0, Ans) :- M>0, X is M-1, ack(X, 1, Ans).
ack(M, N, Ans) :- M>0, N>0, X is M-1, Y is N-1, ack(M, Y, Ans2), ack(X, Ans2, Ans).