public class Application {
  static ImplantationInterface1 ii1 ;
  static ImplantationInterface2 ii2 ;
  static UtilisationImplantation ui ;

  public static void main(String args []) {
    ii1 = new ImplantationInterface1() ;
    ii1.v1 = 5 ;
    ii1.v2 = 15 ;
    ii2 = new ImplantationInterface2() ;
    ii2.v1 = 5 ;
    ii2.v2 = 15 ;
    ii2.v3 = 25 ;
    ui = new UtilisationImplantation() ;
    System.out.println(ui.mediane(ii1)) ;
    System.out.println(ui.mediane(ii2)) ;
    }
  }