#include <bits/stdc++.h>

using namespace std;
#define int long long
const int p=998244353;
int po(int a,int b) {if(b==0) return 1; if(b==1) return a; if(b%2==0) {int u=po(a,b/2);return (u*1LL*u)%p;} else {int u=po(a,b-1);return (a*1LL*u)%p;}}
int inv(int x) {return po(x,p-2);}
mt19937 rnd;
#define app push_back
#define all(x) (x).begin(),(x).end()
#ifdef LOCAL
#define debug(...) [](auto...a){ ((cout << a << ' '), ...) << endl;}(#__VA_ARGS__, ":", __VA_ARGS__)
#define debugv(v) do {cout<< #v <<" : {"; for(int izxc=0;izxc<v.size();++izxc) {cout << v[izxc];if(izxc+1!=v.size()) cout << ","; }cout <<"}"<< endl;} while(0)
#else
#define debug(...)
#define debugv(v)
#endif
#define lob(a,x) lower_bound(all(a),x)
#define upb(a,x) upper_bound(all(a),x)
int32_t main()
{
    ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
    int t;cin>>t;
    while(t--)
    {
        int n;cin>>n;
        vector<int> xs;
        vector<pair<int,int> > a(n);for(int i=0;i<n;++i) {cin>>a[i].first>>a[i].second;xs.app(a[i].first);}
        sort(all(xs));xs.erase(unique(all(xs)),xs.end());
        int u=0,v=1;
        for(int i=1;i+1<xs.size();++i)
        {
            cout<<"? "<<xs[i]<<' '<<1<<endl;
            int p,q;cin>>p>>q;
            p*=(xs[i+1]-xs[i-1]);
            int u1=u*q+v*p;int u2=q*v;
            int o=__gcd(u1,u2);
            u1/=o;u2/=o;
            u=u1;v=u2;
        }
        v*=2;
        int o=__gcd(u,v);u/=o;v/=o;
        cout<<"! "<<u<<' '<<v<<endl;
    }
    return 0;
}