设有n个运动员要进行网球循环赛。设计一个满足以下要求的比赛日程表：

（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是偶数时，循环赛进行n-1天；当n是奇数时，循环赛进行n天。

写程序输出比赛日程表。

-There are n number of athletes to tennis round robin. Schedule of game design that satisfies the following requirements: (1) each player must be the other n-1 players race time (2) Each player can only race once a day (3) when n is even, round robin n Day-1　when n is odd, the round robin n days. Write a program to output game schedule.