c语言题目,变形的斐波那契数列,在acm上为何时间超限

There are another kind of Fibonacci numbers: F(0) = 7, F(1) = 11, F(n) = F(n-1) + F(n-2) (n>=2)
Input
Input consists of a sequence of lines, each containing an integer n. (n < 1,000,000)
Output
Print the word "yes" if 3 divide evenly into F(n). Print the word "no" if not.
Sample Input
0
1
2
3
4
5
Sample Output
no
no
yes
no
no
no

c

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