hdu2085 核反应堆

 1 #include<stdio.h>
 2 int main()
 3 {
 4     int i,n;
 5     __int64 high,low,k;
 6     while(scanf("%d",&n),n+1)
 7     {
 8         for(high=1,low=i=0;i<n;++i)
 9         {
10             k=high;
11             high=3*high+2*low;
12             low=k+low;
13         }
14         printf("%I64d, %I64d\n",high,low);
15     }
16     return 0;
17 }