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Milline allolevatest grammatikatest on järgmise grammatikaga ekvivalentne, aga v...

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Milline allolevatest grammatikatest on järgmise grammatikaga ekvivalentne, aga vasakrekursioon on edukalt eemaldatud?

S → a

S → ε

S → Sb

Allpool kasutame EBNF süntaksit, kus on lubatud ka sulud, küsimärk ja sulundi operaator.

S → a*b?

S → a?b*

100%

S → b*a?

S → b?a*

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