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几个容易错的地方1）搜索时，m可能非常大，下一次的轮圈行为依赖上一次剩下的人，充分利用好取模 2）把圈看成两部分，第一部分k个人，不能被kill，所以当m没有必要一直递增，该跳过去就跳 3）做到了以上两条还是不能ac，做个动态规划 还不ac，楼下有亮瞎眼的暴力方法 :p Followed by:
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