Dim doors.i(100)

For x = 1 To 100
  y = x
  While y <= 100
    doors(y) = 1 - doors(y)
    y + x
  Wend
Next

OpenConsole()
PrintN("Following Doors are open:")
For x = 1 To 100
  If doors(x)
    Print(Str(x) + ", ")
  EndIf
Next
Input()