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| #include<bits/stdc++.h>
#define REG register
using namespace std;
int T,n,k,M,M1,S;
vector<int> Subs[2005];
int Vis[2005];
inline void Init(){
memset(Vis,0,sizeof Vis),S=0;
for(REG int i=1;i<=k;++i) Subs[i].clear();
}
inline void Read(){
scanf("%d %d",&n,&k);
for(REG int i=1;i<=k;++i){
int c,tmp;scanf("%d",&c);
for(REG int j=1;j<=c;++j) scanf("%d",&tmp),Subs[i].push_back(tmp);
}
}
inline int Query(int l,int r){
putchar('?');printf(" %d",r-l+1);
for(REG int i=l;i<=r;++i) printf(" %d",i);
cout<<endl;int Ans;scanf("%d",&Ans);return Ans;
}
inline void GetPos(){
int l=1,r=n,mid;M1=Query(1,n);
while(l<r){
mid=(l+r)>>1;
if(Query(l,mid)==M1) r=mid;
else l=mid+1;
}
M=l;
}
string s;
inline void Work(){
Read(),GetPos();
for(REG int i=1;i<=k;++i)
for(REG int j=0;j<Subs[i].size();++j)
if(Subs[i][j]==M) S=i;
if(!S){putchar('!');for(REG int i=1;i<=k;++i) printf(" %d",M1);puts("");fflush(stdout);}
else{
int Ans;
putchar('?');
for(REG int i=0;i<Subs[S].size();++i) Vis[Subs[S][i]]=1;
printf(" %d",n-Subs[S].size());
for(REG int i=1;i<=n;++i)
if(!Vis[i]) printf(" %d",i);
puts("");
fflush(stdout);
scanf("%d",&Ans);
putchar('!');
for(REG int i=1;i<S;++i) printf(" %d",M1);
printf(" %d",Ans);
for(REG int i=S+1;i<=k;++i) printf(" %d",M1);
puts("");
fflush(stdout);
}
Init();
cin>>s;
}
int main(){
fflush(stdout);
scanf("%d",&T);
while(T--) Work();
}
|
