question: returns the number of vertices in this graph . concode_field_sep int numVertices concode_elem_sep Set<Integer>[] adjacentVertices concode_elem_sep int numEdges concode_elem_sep int v concode_elem_sep int w concode_elem_sep Map<Edge,Integer> edgeCosts concode_field_sep int numEdges concode_elem_sep void dfs_iterative concode_elem_sep int degree concode_elem_sep boolean areAdjacent concode_elem_sep Set<Integer>[] getArray concode_elem_sep int getV concode_elem_sep int getW concode_elem_sep int edgeCost concode_elem_sep void removeEdge concode_elem_sep int hashCode concode_elem_sep boolean equals concode_elem_sep String toString concode_elem_sep String toString concode_elem_sep void addEdge concode_elem_sep void addEdge
target: int function ( ) { return numVertices ; }