题解 | #统计每个月兔子的总数#
统计每个月兔子的总数
http://www.nowcoder.com/practice/1221ec77125d4370833fd3ad5ba72395
def fn(n):
if n == 1 or n == 2:
return 1
return fn(n-1) + fn(n-2)
while True:
try:
n = int(input())
print(fn(n))
except:
break
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