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