is the priority queue empty ? concode_field_sep int[] pq concode_elem_sep int NMAX concode_elem_sep Key[] keys concode_elem_sep IndexMinPQ<Key> copy concode_elem_sep int N concode_elem_sep int[] qp concode_field_sep Integer next concode_elem_sep int delMin concode_elem_sep Key keyOf concode_elem_sep void sink concode_elem_sep void change concode_elem_sep void insert concode_elem_sep void decreaseKey concode_elem_sep void increaseKey concode_elem_sep boolean hasNext concode_elem_sep void main concode_elem_sep void delete concode_elem_sep void remove concode_elem_sep boolean contains concode_elem_sep void changeKey concode_elem_sep Iterator<Integer> iterator concode_elem_sep int size concode_elem_sep Key minKey concode_elem_sep void exch concode_elem_sep int minIndex concode_elem_sep boolean greater concode_elem_sep void swim
boolean function ( ) { return N == 0 ; }