#include using namespace std; typedef signed long long ll; #define _P(...) (void)printf(__VA_ARGS__) #define FOR(x,to) for(x=0;x<(to);x++) #define FORR(x,arr) for(auto& x:arr) #define FORR2(x,y,arr) for(auto& [x,y]:arr) #define ALL(a) (a.begin()),(a.end()) #define ZERO(a) memset(a,0,sizeof(a)) #define MINUS(a) memset(a,0xff,sizeof(a)) template bool chmax(T &a, const T &b) { if(a bool chmin(T &a, const T &b) { if(a>b){a=b;return 1;}return 0;} //------------------------------------------------------- int N; int A[2020],B[2020]; int ask(int a,int b) { cout<<"? "<>a; return a; } void solve() { int i,j,k,l,r,x,y; string s; cin>>N; if(N==1) { cout<<"! 1 1"<=1;i--) { for(x=2;x C; FOR(i,N) { B[i]=ask(0,i); if(B[i]%piv==0) C.push_back(i); } if(C.size()>1) { assert(0); C.clear(); FOR(i,N) { B[i]/=piv; if(B[i]==1) C.push_back(i); } x=ask(1,C[0]); y=ask(1,C[1]); if(x