import math
t=int(input())
for _ in range(t):
    n=int(input())
    a=[]
    xs=[]
    for i in range(n):
        x,y=map(int,input().split())
        a.append([x,y])
        xs.append(x)
    xs.sort()
    xs1=[]
    for i in range(n):
        if(i==0 or (i>0 and xs[i]!=xs[i-1])):
            xs1.append(xs[i])
    xs=xs1
    if(len(xs)<n):
        u=0
        v=1
        for i in range(len(xs)-1):
            print("?",end=' ')
            oo=xs[i]+xs[i+1]
            vv=2
            if(oo%2==0):
                oo//=2
                vv//=2
            print(oo,end=' ')
            print(vv)
            p,q=map(int,input().split())
            p*=(xs[i+1]-xs[i])
            u1=u*q+v*p
            u2=v*q
            o=math.gcd(u1,u2)
            u1//=o
            u2//=o
            u=u1
            v=u2
        o=math.gcd(u,v)
        u//=o
        v//=o
        print("!",end=' ')
        print(u,end=' ')
        print(v)
        continue
    u=0
    v=1
    for i in range(1,len(xs)-1):
        print("?",end=' ')
        print(xs[i],end=' ')
        print(1)
        p,q=map(int,input().split())
        p*=(xs[i+1]-xs[i-1])
        u1=u*q+v*p
        u2=v*q
        o=math.gcd(u1,u2)
        u1//=o
        u2//=o
        u=u1
        v=u2
    v*=2
    o=math.gcd(u,v)
    u//=o
    v//=o
    print("!",end=' ')
    print(u,end=' ')
    print(v)
    continue

answer.code:1:1: error: ‘import’ does not name a type
    1 | import math
      | ^~~~~~
answer.code:1:1: note: C++20 ‘import’ only available with ‘-fmodules-ts’, which is not yet enabled with ‘-std=c++20’