递归方法求解比赛日程安排问题的伪代码

以下是求解比赛日程安排问题的递归方法的伪代码：

def RoundRobin(n):
if n % 2 == 1:
n += 1
matchups = []
for i in range(1, n):
for j in range(i+1, n+1):
if i + j != n + 1:
matchups.append((i, j))
top_half = matchups[:n//2]
bottom_half = [(x[0]+n//2, x[1]+n//2) for x in matchups[n//2:]]
if n > 2:
return RoundRobin(n//2) + [(x[0]+n//2, x[1]+n//2) for x in RoundRobin(n//2)] + bottom_half
else:
return [(1, 2)]