returns the number of edges in the graph . concode_field_sep int E concode_elem_sep int V concode_elem_sep Bag<Integer>[] adj concode_field_sep int V concode_elem_sep Iterable<Integer> adj concode_elem_sep int degree concode_elem_sep void main concode_elem_sep String toString concode_elem_sep void validateVertex concode_elem_sep void addEdge
int function ( ) { return E ; }