题解 | 牛牛学数列6
牛牛学数列6
https://www.nowcoder.com/practice/b6321648517247b2ac2e2f80cbc63ae1
懒得写矩阵快速幂了
n = int(input())
a,b,c = 1,1,0
for _ in range(n-3):
a,b,c = a+2*b+c,a,b
print(a)
牛牛学数列6
https://www.nowcoder.com/practice/b6321648517247b2ac2e2f80cbc63ae1
懒得写矩阵快速幂了
n = int(input())
a,b,c = 1,1,0
for _ in range(n-3):
a,b,c = a+2*b+c,a,b
print(a)
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