def main_alt():
f = 1
for i in xrange(100):
f = remove_end_zeros(f * (i + 1))
print sumDig(f)
def main():
print sumDig(2**1000)
def main():
print sumDig(factorial(100))
def main_alt():
f = 1
for i in xrange(100):
f = remove_end_zeros(f * (i + 1))
print sumDig(f)
def main():
print sumDig(2**1000)
def main():
print sumDig(factorial(100))