from pickle import TRUE
import sys
from fractions import Fraction

input = sys.stdin.readline

for _ in range(int(input())):
    n = int(input())
    x = []
    for i in range(n):
        x.append(int(input().split()[0]))
    x.sort()
    print(*x)
    if len(set(x)) == n:
        l = [Fraction(0)] * n
        for i in range(1, n - 1):
            print("?", x[i], 1, flush=True)
            aa, bb = map(int, input().split())
            l[i] = Fraction(aa, bb)
        ans = 0
        for i in range(n - 1):
            ans += Fraction(x[i + 1] - x[i], 2) * (l[i] + l[i + 1])
        print("!", ans.numerator, ans.denominator, flush=True)
    else:
        ans = 0
        for i in range(n - 1):
            if x[i] != x[i + 1]:
                t = Fraction(x[i] + x[i + 1], 2)
                print("?", t.numerator, t.denominator, flush=True)
                aa, bb = map(int, input().split())
                ans += Fraction(aa, bb) * (x[i + 1] - x[i])
        print("!", ans.numerator, ans.denominator, flush=True)