text: width = int(input())
  lenght = int(input())
  height = int(input())
  full_space = width * lenght * height
  is_room_finished = False
  
  command = input()
  
  while command != 'Done':
      number_boxes = int(command)
      full_space -= number_boxes
  
      if full_space < 0:
          is_room_finished = True
          break
      command = input()
  
  space_left = abs(full_space)
  
  if is_room_finished:
      print (f'No more free space! You need {space_left} Cubic meters more.')
  
  else:
      print (f'{space_left} Cubic meters left.')