Input The input consists of multiple test cases. Each test case contains 3 integers A, B and n on a single line (1 <= A, B <= 1000, 1 <= n <= 100,000,000). Three zeros signal the end of input and this test case is not to be processed.
Output For each test case, print the value of f(n) on a single line.
Sample Input 1 1 3 1 2 10 0 0 0
Sample Output 2 5 代码： #include<cstdio> const int max=52; int f[max]; int main() { int a,b,n; scanf("%d%d%d",&a,&b,&n); a%=7; b%=7; while(a||b||n) { f[1]=1,f[2]=1; for(int i=3;i<max;i++) { f[i]=(a*f[i-1]+b*f[i-2])%7; if(f[i-1]==f[3]&&f[i]==f[4]&&i>4) break; } int t=i-4; if(n<4) printf("%d/n",f[n]); else printf("%d/n",f[(n-4)%t+4]); /* n=(n-2)%(i-4); printf("%d/n",f[2+n]);*/ scanf("%d%d%d",&a,&b,&n); } return 0; }
