题解 | #兔子的数量#
兔子的数量
https://www.nowcoder.com/practice/8783056676de4396b0bf816a3561d62f
def rabit(n):
if n == 1:
return 2
elif n == 2:
return 3
return rabit(n - 1) + rabit(n - 2)
if __name__ == '__main__':
n = int(input())
print(rabit(n))
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