num=input().split()
a=int(num[0])
b=int(num[1])
if a*b>=a+b:
	big=int(a*b)
	small=int(a+b)
else:
	big=int(a+b)
	small=int(a*b)
while small>0:
	tmp=small
	small=big%small
	big=tmp
print(big)