n = int(input())

def count_factor_5(n):
    count = 0
    temp = 5
    while temp <= n:
        count += n // temp
        temp *= 5
    return count

c5 = count_factor_5(n)
if c5 >= 12:
    print("000000000000")
else:
    mod = 10 ** 12
    res = 1
    for i in range(1, n + 1):
        res = (res * i) % mod
    print(res)