from time import sleep

def countdown(n: int) -> None:
    if n <= 0:
        print('Blastoff!')
    else:
        print(n)
        sleep(1)
        countdown(n-1)

def countup(n: int) -> None:
    if n >= 0:
        print('Blastoff!')
    else:
        print(n)
        sleep(1)
        countup(n+1)

def count(n: int) -> None:
    if int(n) >= 0:
        countdown(n)
    else:
        countup(n)

if __name__ == "__main__":
    num = input("Enter a number: ")
    count(int(num))