Each 30 passenger ride with a boat to ship half of the passengers into the sea, 30 people form a circle, starting the first person number, followed by newspaper, number of people to the ninth, gave him into the sea Then a number of his next play, count to 9 people, and then he was thrown into the sea. So cyclically until the remaining 15 passengers so far. Q. Which position will be dropped sea location.

A类4.txt

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