• serhatgiydiren 10 years ago + 1 comment

    ((c|d*)*ab)** is a valid regex, isn't it?

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    • abhiranjan Challenge Author 10 years ago + 2 comments

      Yes.

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      • madan_ram 10 years ago + 0 comments

        I don't think the above regex is not valid, I have tested in regpal.

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        • AhmedAKZM 10 years ago + 1 comment

          It is not a valid regex - it has multiple repeats.

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          • abhiranjan Challenge Author 10 years ago + 1 comment

            Please refer to the definition of kleene star given in the problem statement.

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            • AhmedAKZM 10 years ago + 1 comment

              How should we interpret a*b** then? Is a*b** not equivalent to a*b*? I don't mean to sound inpertinent, but allowing multiple repeats makes no sense (to me anyways)...

              Edit: if it makes sense to you, then please explain how.

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              • abhiranjan Challenge Author 10 years ago + 0 comments

                You already answered yourself.

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