题解 | #统计每个月兔子的总数#
统计每个月兔子的总数
https://www.nowcoder.com/practice/1221ec77125d4370833fd3ad5ba72395
n = int(input())
a = 1
b = 0
c = 0
for i in range(1,n):
c = c+b
b = a
a = c
print(a+b+c)
统计每个月兔子的总数
https://www.nowcoder.com/practice/1221ec77125d4370833fd3ad5ba72395
n = int(input())
a = 1
b = 0
c = 0
for i in range(1,n):
c = c+b
b = a
a = c
print(a+b+c)
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