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mul

dzieciol
May 21st, 2018
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  1. mul(0,_,0):-!.
  2. mul(X,_,_):- X < 0,!.
  3. mul(1,X,X).
  4. mul(X,Y,R) :- X1 is X-1, mul(X1,Y,R1),!, R is R1 + Y.
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