#include<bits/stdc++.h>
#define Gc() getchar()
#define Me(x,y) memset(x,y,sizeof(x))
#define Mc(x,y) memcpy(x,y,sizeof(x))
#define d(x,y) ((m)*(x-1)+(y))
#define R(n) (rnd()%(n)+1)
#define Pc(x) putchar(x)
#define LB lower_bound
#define UB upper_bound
#define fi first
#define se second
#define eb emplace_back
#define all(x) x.begin(),x.end()
using namespace std;using ll=long long;using db=double;using lb=long db;using ui=unsigned;using ull=unsigned long long;using pii=pair<int,int>;
const int N=1e3+5,M=N*4+5,K=1000+5,mod=998244353,Mod=mod-1;const db eps=1e-9;const int INF=1e9+7;mt19937 rnd(28382);
#define Tp template<typename T>
#define Ts template<typename T,typename... Ar>
namespace Debug{
	Tp void _debug(char* f,T t){cerr<<f<<'='<<t<<endl;}
	Ts void _debug(char* f,T x,Ar... y){while(*f!=',') cerr<<*f++;cerr<<'='<<x<<",";_debug(f+1,y...);}
	#ifdef LOCAL
	#define gdb(...) _debug((char*)#__VA_ARGS__,__VA_ARGS__)
	#else 
	#define gdb(...) void()
	#endif
}using namespace Debug;
int n,A[N],B[N],m;
using frac=pair<ll,ll>;
frac operator +(const frac &A,const frac &B){
	int g=__gcd(A.se,B.se);
	return frac(B.se/g*A.fi+A.se/g*B.fi,A.se/g*B.se);
}
frac operator -(const frac &A,const frac &B){
	return A+frac(-B.fi,B.se);
}
frac operator *(const frac &A,const frac &B){
	return frac(A.fi*B.fi,A.se*B.se);
}
frac operator /(const frac &A,const frac &B){
	return A*frac(B.se,B.fi);
}
frac query(int x,int y){
	cout<<"? "<<x<<' '<<y<<endl;
	cin>>x>>y;
	return frac(x,y);
}
void Solve(){
	cin>>n;m=n;
	Me(B,0);
	for(int i=1;i<=n;i++){
		int x,y;cin>>x>>y;
		A[i]=x;B[x]++;
	}
	sort(A+1,A+n+1);m=unique(A+1,A+n+1)-A-1;
	frac La=frac(0,1),ans=frac(0,1);
	for(int i=1;i<m;i++){
		int px=A[i]*3+1,py=A[i+1]*3-1;
		frac w1,w2;
		if(B[A[i]]>=2) w1=query(px,3);
		else w1=La,px--;
		if(i==n-1&&B[A[n]]==1) w2=frac(0,1),py++;
		else w2=query(py,3);
		frac d=(w2-w1)/frac(py-px,1);
		if(px==A[i]*3+1) px--,w1=w1-d;
		if(py==A[i+1]*3-1) py++,w2=w2+d;
		ans=ans+(w1+w2)*frac(A[i+1]-A[i],2);
		La=w2;
	}
	if(ans.fi<0) ans.fi*=-1,ans.se*=-1;
	ll g=__gcd(ans.fi,ans.se);
	cout<<"! "<<ans.fi/g<<' '<<ans.se/g<<endl;
}
int main(){
	int t=1;
	scanf("%d",&t);
	while(t--) Solve();
	cerr<<clock()*1.0/CLOCKS_PER_SEC<<'\n';
}