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  1. gcd(X,X,X).
  2. gcd(X,Y,G) :-
  3.     X<Y,
  4.     Y1 is Y-X,
  5.     gcd(X,Y1,G).
  6. gcd(X,Y,G) :-
  7.     X>Y,
  8.     X1 is X-Y,
  9.     gcd(Y,X1,G).
Success #stdin #stdout #stderr 0.02s 6980KB
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Standard input is empty
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Standard output is empty
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ERROR: '$runtoplevel'/0: Undefined procedure: program/0
   Exception: (3) program ? EOF: exit
https://ideone.com/HdN8oG
language:
Prolog (swi 7.6.4)
created:
2 years ago
visibility:
public

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