//line 1 "answer.cpp"
#if !__INCLUDE_LEVEL__
#include __FILE__
int solve() {
    ll n; input(n);
    vl x(n), y(n);
    rep(i, n) input(x[i], y[i]);
    auto query = [&] (Frac f) -> Frac {
        f.reduce();
        print("?", f.num, f.den);
        cout.flush();
        ll r,s; input(r, s);
        return Frac(r, s);
    };
    auto answer = [&] (Frac f) {
        f.reduce();
        print("!", f.num, f.den);
        cout.flush();
    };
    vl c = x;
    uniq(c);
    vector<Frac> fx(sz(c));
    rep(i, sz(c)) fx[i] = Frac(c[i], 1);
    vl cnt(sz(c), 0);
    rep(i, n) {
        ll p = lower_bound(all(c), x[i]) - c.begin();
        cnt[p]++;
    }
    vector<pair<Frac,Frac>> qa(sz(c));
    vector<bool> mv(sz(c), false);
    Frac diff = Frac(1, 1000);
    debug(c, cnt);
    if (cnt[0] > 1) {
        mv[0] = true;
        qa[0].second = query(fx[0] + diff);
    } else {
        qa[0].second = Frac(0, 1);
    }
    if (cnt[sz(c)-1] > 1) {
        mv[sz(c)-1] = true;
        qa[sz(c)-1].first = query(fx[sz(c)-1] - diff);
    } else {
        qa[sz(c)-1].first = Frac(0, 1);
    }
    rep(i, 1, sz(c)-1) {
        debug(i);
        if (cnt[i] == 1) {
            Frac ans = query(fx[i]);
            qa[i].first = ans;
            qa[i].second = ans;
        } else {
            mv[i] = true;
            qa[i].first = query(fx[i] - diff);
            qa[i].second = query(fx[i] + diff);
        }
    }
    Frac ans = Frac(0);
    rep(i, sz(c)-1) {
        auto f1 = qa[i].second;
        auto f2 = qa[i+1].first;
        Frac dist = fx[i+1] - fx[i];
        if (mv[i]) dist = dist - diff;
        if (mv[i+1]) dist = dist - diff;
        debug(dist);
        if (mv[i]) {
            f1 = f1 + (f1 - f2) / dist * diff;
            dist = dist + diff;
        }
        if (mv[i+1]) {
            f2 = f2 + (f2 - f1) / dist * diff;
            dist = dist + diff;
        }
        debug(f1, f2, dist);
        ans = ans + ((f1 + f2) * dist) / Frac(2);
    }
    answer(ans);
    return 0;
}
int main() {
    ll t; input(t);
    rep(t) solve();
}
#else
//line 2 "/home/seekworser/.cpp_lib/competitive_library/competitive/std/std.hpp"
#include <bits/stdc++.h>
#ifndef LOCAL_TEST
#pragma GCC target ("avx")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#endif // LOCAL_TEST
using namespace std;
// 型名の短縮
using ll = long long;
using pii = pair<int, int>; using pll = pair<ll, ll>;
using vi = vector<int>;  using vvi = vector<vi>; using vvvi = vector<vvi>;
using vl = vector<ll>;  using vvl = vector<vl>; using vvvl = vector<vvl>;
using vb = vector<bool>; using vvb = vector<vb>; using vvvb = vector<vvb>;
using vc = vector<char>; using vvc = vector<vc>; using vvvc = vector<vvc>;
using vd = vector<double>; using vvd = vector<vd>; using vvvd = vector<vvd>;
using vs = vector<string>; using vvs = vector<vector<string>>; using vvvs = vector<vector<vector<string>>>;
template<typename T> vector<vector<T>> vv(int h, int w, T val = T()) { return vector(h, vector<T>(w, val)); }
template<typename T> vector<vector<vector<T>>> vvv(int h1, int h2, int h3, T val = T()) { return vector(h1, vector(h2, vector<T>(h3, val))); }
template<typename T> vector<vector<vector<vector<T>>>> vvvv(int h1, int h2, int h3, int h4, T val = T()) { return vector(h1, vector(h2, vector(h3, vector<T>(h4, val)))); }
template <class T> using priority_queue_min = priority_queue<T, vector<T>, greater<T>>;
// 定数の定義
constexpr double PI = 3.14159265358979323;
constexpr int INF = 100100111; constexpr ll INFL = 3300300300300300491LL;
float EPS = 1e-8; double EPSL = 1e-16;
template<typename T> bool eq(const T x, const T y) { return x == y; }
template<> bool eq<double>(const double x, const double y) { return abs(x - y) < EPSL; }
template<> bool eq<float>(const float x, const float y) { return abs(x - y) < EPS; }
template<typename T> bool neq(const T x, const T y) { return !(eq<T>(x, y)); }
template<typename T> bool ge(const T x, const T y) { return (eq<T>(x, y) || (x > y)); }
template<typename T> bool le(const T x, const T y) { return (eq<T>(x, y) || (x < y)); }
template<typename T> bool gt(const T x, const T y) { return !(le<T>(x, y)); }
template<typename T> bool lt(const T x, const T y) { return !(ge<T>(x, y)); }
constexpr int MODINT998244353 = 998244353;
constexpr int MODINT1000000007 = 1000000007;
// 入出力高速化
struct Nyan { Nyan() { cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(18); } } nyan;
// 汎用マクロの定義
#define all(a) (a).begin(), (a).end()
#define sz(x) ((ll)(x).size())
#define rep1(n) for(ll dummy_iter = 0LL; dummy_iter < n; ++dummy_iter) // 0 から n-1 まで昇順
#define rep2(i, n) for(ll i = 0LL, i##_counter = 0LL; i##_counter < ll(n); ++(i##_counter), (i) = i##_counter) // 0 から n-1 まで昇順
#define rep3(i, s, t) for(ll i = ll(s), i##_counter = ll(s); i##_counter < ll(t); ++(i##_counter), (i) = (i##_counter)) // s から t まで昇順
#define rep4(i, s, t, step) for(ll i##_counter = step > 0 ? ll(s) : -ll(s), i##_end = step > 0 ? ll(t) : -ll(t), i##_step = abs(step), i = ll(s); i##_counter < i##_end; i##_counter += i##_step, i = step > 0 ? i##_counter : -i##_counter) // s から t まで stepずつ
#define overload4(a, b, c, d, e, ...) e
#define rep(...) overload4(__VA_ARGS__, rep4, rep3, rep2, rep1)(__VA_ARGS__)
#define repe(a, v) for(auto& a : (v)) // v の全要素（変更可能）
#define smod(n, m) ((((n) % (m)) + (m)) % (m)) // 非負mod
#define sdiv(n, m) (((n) - smod(n, m)) / (m)) // 非負div
#define uniq(a) {sort(all(a)); (a).erase(unique(all(a)), (a).end());} // 重複除去
int Yes(bool b=true) { cout << (b ? "Yes\n" : "No\n"); return 0; };
int YES(bool b=true) { cout << (b ? "YES\n" : "NO\n"); return 0; };
int No(bool b=true) {return Yes(!b);};
int NO(bool b=true) {return YES(!b);};
template<typename T, size_t N> T max(array<T, N>& a) { return *max_element(all(a)); };
template<typename T, size_t N> T min(array<T, N>& a) { return *min_element(all(a)); };
template<typename T> T max(vector<T>& a) { return *max_element(all(a)); };
template<typename T> T min(vector<T>& a) { return *min_element(all(a)); };
template<typename T> vector<T> accum(const vector<T>& a) { vector<T> rev(sz(a)+1, 0); rep(i, sz(a)) rev[i+1] = rev[i] + a[i]; return rev; };
template<typename T> vector<T> vec_slice(const vector<T>& a, int l, int r) { vector<T> rev; rep(i, l, r) rev.push_back(a[i]); return rev; };
template<typename T> T sum(vector<T>& a, T zero = T(0)) { T rev = zero; rep(i, sz(a)) rev += a[i]; return rev; };
template<typename T> bool in_range(const T& val, const T& s, const T& t) { return s <= val && val < t; };

template <class T> inline vector<T>& operator--(vector<T>& v) { repe(x, v) --x; return v; }
template <class T> inline vector<T>& operator++(vector<T>& v) { repe(x, v) ++x; return v; }

// modでのpow
ll powm(ll a, ll n, ll mod=INFL) {
    ll res = 1;
    while (n > 0) {
        if (n & 1) res = (res * a) % mod;
        if (n > 1) a = (a * a) % mod;
        n >>= 1;
    }
    return res;
}
// 整数Sqrt
ll sqrtll(ll x) {
    assert(x >= 0);
    ll rev = sqrt(x);
    while(rev * rev > x) --rev;
    while((rev+1) * (rev+1)<=x) ++rev;
    return rev;
}
template <class T> inline bool chmax(T& M, const T& x) { if (M < x) { M = x; return true; } return false; } // 最大値を更新（更新されたら true を返す）
template <class T> inline bool chmin(T& m, const T& x) { if (m > x) { m = x; return true; } return false; } // 最小値を更新（更新されたら true を返す）
int digit(ll x, int d=10) { int rev=0; while (x > 0) { rev++; x /= d;}; return rev; } // xのd進数桁数
/**
 * @brief std.hpp
 * @docs docs/std/std.md
 */
//line 3 "/home/seekworser/.cpp_lib/competitive_library/competitive/math/fraction.hpp"
struct Frac {
    ll num;
    ll den;
    Frac (ll _num, ll _den, bool reduce = true) : num(_num), den(_den) {
        if (reduce) (*this).reduce();
    }
    Frac (ll _num) : Frac(_num, 1) {}
    Frac () : num(0), den(1) {}
    static ll redcue_limit;

    Frac inv() const { return Frac((*this).den, (*this).num); }
    Frac &operator+=(const Frac &x) {
        (*this).num = (*this).num * x.den + x.num * (*this).den;
        (*this).den = (*this).den * x.den;
        if ((*this).den > redcue_limit || (*this).num > redcue_limit) (*this).reduce();
        return (*this);
    }
    Frac &operator-=(const Frac &x) {
        (*this).num = (*this).num * x.den - x.num * (*this).den;
        (*this).den = (*this).den * x.den;
        if ((*this).den > redcue_limit || (*this).num > redcue_limit) (*this).reduce();
        return (*this);
    }
    Frac &operator*=(const Frac &x) {
        (*this).num = (*this).num * x.num;
        (*this).den = (*this).den * x.den;
        if ((*this).den > redcue_limit || (*this).num > redcue_limit) (*this).reduce();
        return (*this);
    }
    Frac &operator/=(const Frac &x) {
        (*this) *= x.inv();
        if ((*this).den > redcue_limit || (*this).num > redcue_limit) (*this).reduce();
        return (*this);
    }
    Frac operator+(const Frac &x) const { return (Frac(*this) += x); }
    Frac operator-(const Frac &x) const { return (Frac(*this) -= x); }
    Frac operator*(const Frac &x) const { return (Frac(*this) *= x); }
    Frac operator/(const Frac &x) const { return (Frac(*this) /= x); }

    Frac operator+() const { return *this; }
    Frac operator-() const { Frac x(-(*this).num, (*this).den); return x; }
    friend bool operator==(const Frac& lhs, const Frac& rhs) {
        return lhs.num * rhs.den == lhs.den * rhs.num;
    }
    friend bool operator!=(const Frac& lhs, const Frac& rhs) {
        return lhs.num * rhs.den != lhs.den * rhs.num;
    }
    friend bool operator>=(const Frac& lhs, const Frac& rhs) {
        return lhs.num * rhs.den >= lhs.den * rhs.num;
    }
    friend bool operator<=(const Frac& lhs, const Frac& rhs) {
        return lhs.num * rhs.den <= lhs.den * rhs.num;
    }
    friend bool operator>(const Frac& lhs, const Frac& rhs) {
        return lhs.num * rhs.den > lhs.den * rhs.num;
    }
    friend bool operator<(const Frac& lhs, const Frac& rhs) {
        return lhs.num * rhs.den < lhs.den * rhs.num;
    }

    double val() const {return (double)((*this).num) / (double)((*this).den); }
    friend ostream& operator<<(ostream& os, const Frac &x) { os << x.val(); return os; }
    void reduce() {
        assert((*this).den != 0 || (*this).num != 0);
        if ((*this).den == 0) { (*this).num = 1; return; }
        if ((*this).num == 0) { (*this).den = 1; return; }
        ll g = gcd((*this).num, (*this).den);
        (*this).num /= g;
        (*this).den /= g;
        if ((*this).den < 0) {
            (*this).num *= -1;
            (*this).den *= -1;
        }
        return;
    }
};
ll Frac::redcue_limit = 1000000000;
Frac pow(const Frac &a, ll n) {
    Frac res(1); Frac cur(a);
    while (n > 0) {
        if (n & 1) res *= cur;
        cur *= cur;
        n >>= 1;
    }
    return res;
}
Frac abs(const Frac &f) {
    Frac rev(f);
    if (rev.den * rev.num < 0) return -rev;
    return rev;
}
/**
 * @brief fraction.hpp
 * @docs docs/math/fraction.md
 */
//line 3 "/home/seekworser/.cpp_lib/competitive_library/competitive/std/io.hpp"
// 演算子オーバーロード（プロトタイプ宣言）
template <class T, class U> inline istream& operator>>(istream& is, pair<T, U>& p);
template <class T> inline istream& operator>>(istream& is, vector<T>& v);
template <class T, class U> inline ostream& operator<<(ostream& os, const pair<T, U>& p);
template <class T> inline ostream& operator<<(ostream& os, const vector<T>& v);
template <typename T, typename S> ostream &operator<<(ostream &os, const map<T, S> &mp);
template <typename T> ostream &operator<<(ostream &os, const set<T> &st);
template <typename T> ostream &operator<<(ostream &os, const multiset<T> &st);
template <typename T> ostream &operator<<(ostream &os, const unordered_set<T> &st);
template <typename T> ostream &operator<<(ostream &os, queue<T> q);
template <typename T> ostream &operator<<(ostream &os, deque<T> q);
template <typename T> ostream &operator<<(ostream &os, stack<T> st);
template <class T, class Container, class Compare> ostream &operator<<(ostream &os, priority_queue<T, Container, Compare> pq);

// 演算子オーバーロード
template <class T, class U> inline istream& operator>>(istream& is, pair<T, U>& p) { is >> p.first >> p.second; return is; }
template <class T> inline istream& operator>>(istream& is, vector<T>& v) { repe(x, v) is >> x; return is; }
template <class T, class U> inline ostream& operator<<(ostream& os, const pair<T, U>& p) { os << p.first << " " << p.second; return os; }
template <class T> inline ostream& operator<<(ostream& os, const vector<T>& v) { rep(i, sz(v)) { os << v.at(i); if (i != sz(v) - 1) os << " "; } return os; }
template <typename T, typename S> ostream &operator<<(ostream &os, const map<T, S> &mp) { for (auto &[key, val] : mp) { os << key << ":" << val << " "; } return os; }
template <typename T> ostream &operator<<(ostream &os, const set<T> &st) { auto itr = st.begin(); for (int i = 0; i < (int)st.size(); i++) { os << *itr << (i + 1 != (int)st.size() ? " " : ""); itr++; } return os; }
template <typename T> ostream &operator<<(ostream &os, const multiset<T> &st) { auto itr = st.begin(); for (int i = 0; i < (int)st.size(); i++) { os << *itr << (i + 1 != (int)st.size() ? " " : ""); itr++; } return os; }
template <typename T> ostream &operator<<(ostream &os, const unordered_set<T> &st) { ll cnt = 0; for (auto &e : st) { os << e << (++cnt != (int)st.size() ? " " : ""); } return os; }
template <typename T> ostream &operator<<(ostream &os, queue<T> q) { while (q.size()) { os << q.front() << " "; q.pop(); } return os; }
template <typename T> ostream &operator<<(ostream &os, deque<T> q) { while (q.size()) { os << q.front() << " "; q.pop_front(); } return os; }
template <typename T> ostream &operator<<(ostream &os, stack<T> st) { while (st.size()) { os << st.top() << " "; st.pop(); } return os; }
template <class T, class Container, class Compare> ostream &operator<<(ostream &os, priority_queue<T, Container, Compare> pq) { while (pq.size()) { os << pq.top() << " "; pq.pop(); } return os; }

template <typename T> int print_sep_end(string sep, string end, const T& val) { (void)sep; cout << val << end; return 0; };
template <typename T1, typename... T2> int print_sep_end(string sep, string end, const T1 &val, const T2 &...remain) {
    cout << val << sep;
    print_sep_end(sep, end, remain...);
    return 0;
};
template <typename... T> int print(const T &...args) { print_sep_end(" ", "\n", args...); return 0; };
template <typename... T> void flush() { cout << flush; };
template <typename... T> int print_and_flush(const T &...args) { print(args...); flush(); return 0; };
#define debug(...) debug_func(0, #__VA_ARGS__, __VA_ARGS__) // debug print
template <typename T> void input(T &a) { cin >> a; };
template <typename T1, typename... T2> void input(T1&a, T2 &...b) { cin >> a; input(b...); };
#ifdef LOCAL_TEST
template <typename T> void debug_func(int i, const T name) { (void)i; (void)name; cerr << endl; }
template <typename T1, typename T2, typename... T3> void debug_func(int i, const T1 &name, const T2 &a, const T3 &...b) {
    int scope = 0;
    for ( ; (scope != 0 || name[i] != ',') && name[i] != '\0'; i++ ) {
        cerr << name[i];
        if (name[i] == '(' || name[i] == '{') scope++;
        if (name[i] == ')' || name[i] == '}') scope--;
    }
    cerr << ":" << a << " ";
    debug_func(i + 1, name, b...);
}
template <typename T1, typename T2, typename... T3> void debug_func(int i, const T1 &name, T2 &a, T3 &...b) {
    int scope = 0;
    for ( ; (scope != 0 || name[i] != ',') && name[i] != '\0'; i++ ) {
        cerr << name[i];
        if (name[i] == '(' || name[i] == '{') scope++;
        if (name[i] == ')' || name[i] == '}') scope--;
    }
    cerr << ":" << a << " ";
    debug_func(i + 1, name, b...);
}
#endif
#ifndef LOCAL_TEST
template <typename... T>
void debug_func(T &...) {}
template <typename... T>
void debug_func(const T &...) {}
#endif
/**
 * @brief io.hpp
 * @docs docs/std/io.md
 */
//line 86 "answer.cpp"
#endif