#include<bits/stdc++.h>
using namespace std;
int ans[1003],qry[1003][1003];
const int S=16,N=1000;
int sum[1003];
int query(int l,int r){
	cout<<"? "<<l<<" "<<r<<endl;
	int num;cin>>num;return num;
}
void solve(int l,int r){
	for(int i=l;i<=r;++i)
	  for(int j=i;j<=r;++j)qry[i][j]=query(i,j);
	for(int i=0;i<(1<<r-l+1);++i){
	    sum[l-1]=0;
	    for(int j=0;j<r-l+1;++j)sum[l+j]=sum[l+j-1]+((i>>j)&1);
	    int cnt=0,mn=0,mx=0;
	    for(int a=l;a<=r;++a)
		    for(int b=a;b<=r;++b){
		    	if(qry[a][b]==sum[b]-sum[a-1])++cnt;else --cnt;
		    	mn=min(mn,cnt);mx=max(mx,cnt);
			}
	    bool flag=(abs(cnt)<=2);flag&=((mx-mn)<=(r-l+1));
		if(flag){
	    	for(int j=0;j<r-l+1;++j)ans[l+j]=((i>>j)&1);
	    	return;
		}
	}
}
int main(){
	mt19937 rnd(time(0));
	for(int i=1;i<=N;){
		int d=S/2+rnd()%(S/2+1);
		solve(i,min(i+d-1,N));i+=d;
	}
	cout<<"! ";for(int i=1;i<=N;++i)putchar(ans[i]+'0');cout<<endl;
	return 0;
}