Number Sequence

 1 #include<iostream>
 2 using namespace std;
 3 const int maxn=100000000;
 4 int A,B,n,m,f[maxn];
 5 
 6 int main()
 7 {int i;
 8 f[1]=1;f[2]=1;
 9 cin>>A>>B>>n;
10 while(A!=0||B!=0||n!=0)
11 {
12     for(i=3;i<=49;i++)
13 f[i]=(A*f[i-1]+B*f[i-2])%7;
14     m=n%49;
15 cout<<f[m]<<endl;
16 cin>>A>>B>>n;
17 }
18 return 0;
19 }