04. OwnBusiness

# 04. OwnBusiness
roomWidth = int(input())
roomLength = int(input())
roomHeight = int(input())
roomVolume = roomWidth * roomLength * roomHeight
computerVolume = 0
computerVolume = input()
while not computerVolume == "Done":
    roomVolume -= int(computerVolume)

    if roomVolume <= 0:
        print(f"No more free space! You need {abs(roomVolume)} Cubic meters more.")
        break
    computerVolume = input()


if computerVolume == "Done":
    print(f"{roomVolume} Cubic meters left.")