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Yuesefu_assume
- 船上共30人,每隔九个扔下一个(从一开始数,第十个扔下,在从一开始,第十个扔下,数完一圈再从头开始),扔掉一半,求扔出的序号-A total of 30 people on board, every nine dropped a (dropped from the beginning of the tenth, from the beginning, dropped in a 10 count circle again from scratch start) throw away half, s