inputer = input()
inputer_d = inputer.split(" ")
first_n = int(inputer_d[0])
second_n = int(inputer_d[1])
result=0

wa = int(first_n+second_n)
seki = int(first_n*second_n)
saidai_sho=0
saidai_sa =0
tmp=0

if wa > seki:
	saidai_sa= int(wa%seki)
	saidai_sho= seki
	while(saidai_sho%saidai_sa >0 and saidai_sa>0):
		tmp=int(saidai_sho%saidai_sa)
		saidai_sho=saidai_sa
		saidai_sa = tmp
	result =saidai_sho
elif wa < seki:
	saidai_sa= seki-wa
	saidai_sho= wa
	while(saidai_sho%saidai_sa >0 and saidai_sa>0):
		tmp=int(saidai_sho%saidai_sa)
		saidai_sho=saidai_sa
		saidai_sa = tmp
	result =saidai_sho
else:
	result=wa

print(result)