from fractions import Fraction
import sys
import math
def qr(k):
	print(f"? {k} 1")
	sys.stdout.flush()
	x,y=map(int,input().split())
	return Fraction(x,y)
def trap(a,b,d):
	return d*(a+b)/2
t = int(input())
for k in range(t):
	n=int(input())
	pts=[]
	for i in range(n):
		x,y=map(int,input().split())
		pts.append((x,y))
	pts.sort()
	if pts[0][0] == pts[-1][0]:
		print("! 0 1")
		sys.stdout.flush()
		continue
	lst=Fraction(0,1)
	if pts[0][0] != pts[1][0]:
		lst=Fraction(0,1)
	else:
		lst=qr(pts[0][0])
	area=Fraction(0,1)
	for i in range(0,n-2):
		if pts[i][0] != pts[i+1][0]:
			d=pts[i+1][0]-pts[i][0]
			novi=qr(pts[i+1][0])
			area=area+trap(lst,novi,d)
			lst=novi
	if pts[n-2][0] != pts[n-1][0]:
		area=area+trap(lst,0,pts[n-1][0]-pts[n-2][0])
	print(f"! {area.numerator} {area.denominator}")
	sys.stdout.flush()