Description: The beginning of a winter break near Spring Festival is always the beginning of a peak perio d of transportation. If you have ever tried to ge not a train ticket at that time. you must have witnessed the endless queues in fr ont of every ticket box window. If a guy has seen h is friend in a queue, then it is very much likely that this lucky guy mi ght go straight to his friend and ask for a favor. This is called "jumping the queue." It is unfair to the rest of the people in the line, but, it is life. Your task is to write a program that si mulates such a queue with people jumping in ever y now and then, assume that, if one in the queue has several friends asking az r favors. he would arrange their requests in a queue of his own
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