returns true if the queue is empty . concode_field_sep double[] a concode_elem_sep int[] pq concode_elem_sep int d concode_elem_sep int n concode_elem_sep int[] qp concode_field_sep void swap concode_elem_sep void sink concode_elem_sep void lower concode_elem_sep void change concode_elem_sep void insert concode_elem_sep boolean less concode_elem_sep int poll concode_elem_sep void swim
boolean function ( ) { return n == 0 ; }