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0_0_17813059_6772.cpp:1:278: fatal error: GCC4.9.2/lib/gcc/x86_64-w64-mingw32/4.9.2/include/stdio.h>in: Invalid argument
 #include<stdio.h>int main(){  int f[50],a,b,n,i;    while(scanf("%d%d%d",&a,&b,&n)!=EOF)    {        if(a==0&&b==0&&n==0) break;       // f[0]=0;        f[1]=f[2]=1;        for(i=3;i<=49;i++)            f[i]=(a*f[i-1]+b*f[i-2])%7;        printf("%d\n",f[n%49]);    } return 0;}
                                                                                                                                                                                                                                                                                      ^
compilation terminated.