Szukana fraza: [Abstract = "This paper considers a discrete\-time queueing system in which an arriving customer can decide to follow a last come first served \(LCFS\) service discipline or to become a negative customer that eliminates the one at service, if any. After service completion, the server can opt for a vacation time or it can remain on duty. Changes in the vacation times as well as their associated distribution are thoroughly studied."]

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