typedef unsigned long int ul;
typedef struct{ul q; ul r;} res;
res divq(ul a, ul b, ul d);
res mulq(ul a, ul b);
int main(){int j = 100000000; while(j--) divq(5L<<50, 318, 3L<<60);
return 0;}
// clang -O3 d.c q.s; time ./a.out
// 2.47 sec