#define LOCAL
#include <bits/stdc++.h>
#define fir first
#define sec second
#define el '\n'

#ifdef LOCAL
#define FINISH cerr << "FINISH" << endl;
#else
#define FINISH ;
#endif

#ifdef LOCAL
#define debug(x) cerr << setw(4) << #x << " == " << x << endl
#else
#define debug(x)
#endif

#ifdef LOCAL
#define debugv(x)                   \
    cerr << setw(4) << #x << ":: "; \
    for (auto i : x)                \
        cerr << i << " ";           \
    cerr << endl
#else
#define debugv(x)
#endif

using namespace std;
typedef long long ll;
typedef pair<int, int> PII;
ostream& operator<<(ostream& out, PII& x)
{
    out << x.fir << " " << x.sec << endl;
    return out;
}

const int mod = 998244353;
const int inf = 0x3f3f3f3f;
const int N = 200020;
struct point {
	int x, y;
};
void solve()
{
    int n;
    cin >> n;
    vector<point> p(n + 1);
    for (int i = 1; i <= n; i++) {
    	cin >> p[i].x >> p[i].y;
    }
    sort(next(p.begin()), p.end(), [&](point x, point y) {
    	return x.x < y.x;
    });	
    ll lasx = 0, lasy = 1;
    ll areax = 0, areay = 1;
    for (int i = 2; i < n; i++) {
    	int res = p[i].x;
    	if ((p[i].x + p[i - 1].x) % 2 == 0) {
    		cout << "? " << (p[i].x + p[i - 1].x) / 2 << " " << 1 << endl;
    	}
    	else {
    		cout << "? " << (p[i].x + p[i - 1].x) << " " << 2 << endl;
    	}
    	ll x, y;
    	cin >> x >> y;

    	ll nxtx = 2 * x * lasy - y * lasx;
    	ll nxty = y * lasy;
    	ll g = __gcd (nxtx, nxty);
    	nxtx /= g, nxty /= g;
    	lasx = nxtx, lasy = nxty;

    	ll len = p[i].x - p[i - 1].x;
    	x = x * len;

    	ll nxtareax = x * areay + y * areax;
    	ll nxtareay = y * areay;
    	g = __gcd (nxtareax, nxtareay);
    	areax = nxtareax / g;
    	areay = nxtareay / g;
    }

    ll len = p[n].x - p[n - 1].x;
	ll nxtx = len * lasx;
    ll nxty = 2 * lasy;
    ll g = __gcd (nxtx, nxty);
    nxtx /= g, nxty /= g;
    ll nxtareax = nxty * areax + nxtx * areay;
    ll nxtareay = nxty * areay;
    g = __gcd (nxtareax, nxtareay);
    areax = nxtareax / g;
    areay = nxtareay / g;

    cout << "! " << areax << " " << areay << endl;
}
int main()
{
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cout.tie(nullptr);
    int T = 1;
    cin >> T;
    while (T--) {
        solve();
    }
    return 0;
}