int sum(int len, const int arr[]) {
	int i;
	int sum = 0;
	for (i = 0; i < len; i++) {
		sum += arr[i];
	}
	return sum;
}

int main() {

	/* BENCHMARK START */
	/* array for the benchmark */
	const int arr [] = { 2,  3,  5,  7, 11, 13, 17, 19,
						 23, 29, 31, 37, 41, 43, 47, 53 };
	int retval = sum(16, arr);
	/* BENCHMARK END */

	return retval;
}