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A recent question about determining whether an array of length N containing integers from 1 to N is a permutation in O(N) time was a duplicate of a previous question that was stated slightly differently but equivalently.

I cast one of the votes to close, and the question was eventually closed.

Now it has been reopened, and I cannot vote to close again. Why?

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up vote 4 down vote accepted

You can't vote to close twice, or open twice, it has to be a new 5 (or less with a moderator) people who do the open/close each time. Otherwise it could be a non-stop open/close war between the same small group of people.

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hmm, i guess that makes sense. – Jason S Nov 1 '10 at 1:30

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