import sys
def query(p):
	print(p[0],p[1])
	sys.stdout.flush()
	ret = int(input())
	if ret == 0:
		sys.exit(0)
	return ret
def getX(left,right):
	l,r = left,right
	while r-l>1:
		m = (l+r)//2
		d1=query((m,0))
		d2=query((m+1,0))
		if d1 < d2:
			r = m
		else:
			l = m
	return r
d=query((0,0))
x=getX(-1,100000+1)
query((x,d-x))