lldiv_t lldiv(long long int numer, long long int denom);
lldiv computes numer / denom and numer % denom in a single operation.
lldiv returns a structure of type lldiv_t comprising both the quotient and the remainder. The structures contain the members quot (the quotient) and rem (the remainder), each of which has the same type as the arguments numer and denom. If either part of the result cannot be represented, the behavior is undefined.