chapter02 cluster_Nodes Start1 Start Con_2 #1 Con_2->Start1 0 Con_3 #2 Con_3->Start1 0 Add4 + Add4->Con_2 1 Add4->Con_3 2 Con_5 #3 Con_5->Start1 0 Return6 Return Return6->Start1 0 Return6->Con_5 1