shirochina = int(input())
daljina = int(input())
visochina = int(input())

area = shirochina * visochina * daljina

while True:
    computers = input()
    if computers == "Done":
        print(f"{area} Cubic meters left.")
        break
    else:
        computers = int(computers)

    area -= computers

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