说明：  josephus算法 n个人围成一圈报数,报到人出去,相信很多人都知道这个经典题目,解法有数组法等等, 其实,这就是jos
(Josephus algorithm n people round the number of reports out, I believe many people know this classic problem, the solution has array method, and so on, in fact, this is jos)