猴子选大王。从头到尾数，再从尾到头，报数能被N除尽者留下，其余退出。直到剩下不到N只猴子时，报1者为王。-Monkey king election. Number from start to finish, from the end of coming to an end, reported the number of those left behind can be divisible by N, and the remaining exit. Until the monkey is less