设计一个满足以下要求的循环比赛日程表：（）

(1)每个选手必须与其他n-1个选手各赛一次；

(2)每个选手一天只能赛一次；

(3)当n是奇数时,循环赛一共进行n天, n是偶数时,循环赛进行n-1天。

-Meet the following requirements to design a cycle race schedule: () (1) Each player must be with the other n-1 once a player of the tournament　(2) Each player can only race once a day　(3) When n is odd , the round robin conducted a total of n days, n is even, round robin for n-1 days.