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找规律,分析让 F[N] 每一项对 3 取余的余数:
1,2,0,
2,2,1,0,
1,1,2,0,
2,2,1,0,
1,1,2,0,
2,2,1,0
......... 显然循环了
1 #include <iostream> 2 using namespace std; 3 int main() 4 { 5 int n; 6 while(cin>>n){ 7 if(n%4==2) cout<<"yes"<<endl; 8 else cout<<"no"<<endl; 9 } 10 return 0; 11 }//2016-04-22 22:14:02
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原文地址:http://www.cnblogs.com/nicetomeetu/p/5423016.html