algo_needs_num_missing
if(algo_needs_num_missing(&needs) == 0) {
(int)algo_needs_num_missing(&needs));
size_t algo_needs_num_missing(struct algo_needs* n);
if(algo_needs_num_missing(&needs) == 0) {
(int)algo_needs_num_missing(&needs));
size_t algo_needs_num_missing(struct algo_needs* n);