题解 | 牛牛学数列6
牛牛学数列6
https://www.nowcoder.com/practice/b6321648517247b2ac2e2f80cbc63ae1
n=int(input()) if n==1: print(0) elif n==2 or n==3: print(1) else: a,b,c=0,1,1 for i in range(4,n+1): a,b,c=b,c,a+2*b+c print(c)
牛牛学数列6
https://www.nowcoder.com/practice/b6321648517247b2ac2e2f80cbc63ae1
n=int(input()) if n==1: print(0) elif n==2 or n==3: print(1) else: a,b,c=0,1,1 for i in range(4,n+1): a,b,c=b,c,a+2*b+c print(c)
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