题解 | 牛牛学数列6
牛牛学数列6
https://www.nowcoder.com/practice/b6321648517247b2ac2e2f80cbc63ae1
import sys
n = int(input())
f = [0,1,1]
for i in range(3,n+1):
f.append(f[i-1]+2*f[i-2]+f[i-3])
print(f[n-1])
牛牛学数列6
https://www.nowcoder.com/practice/b6321648517247b2ac2e2f80cbc63ae1
import sys
n = int(input())
f = [0,1,1]
for i in range(3,n+1):
f.append(f[i-1]+2*f[i-2]+f[i-3])
print(f[n-1])
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