inputer = input()
inputer_s = inputer.split(" ")

a_num = int(inputer_s[0])
b_num = int(inputer_s[1])
result = 0

if b_num==0:
	result = 1
elif a_num == 0:
	result = -1
else:
	if b_num > 0:
		if a_num < 0:
			result=2
		else:
			result=-1
	elif b_num < 0:
		if a_num > 0:
			result=2
		else:
			result=-1

print(result)