text: main()
  {
          int a = 0;
  
          do {
                  register int _o = 2;
                  do {
                          switch (_o) {
                          case 1:
                                  a = 4;
                          case 0:
                                  break;
                          case 2:
                                  _o = !!(foo());
                                  continue;
                          } break;
                  } while (1);
          } while (0);
          printf("%d\n", a);
          exit(0);
  }
  