#include <cstdio>
#include <cstring>
#include <cmath>
#include <algorithm>
#include <iostream>
using namespace std;

//namaega184  

int main(){
	int left=0,right=1000000000,mid=0;
	
	cout << "! 1" << endl;
	//printf("! %d",1111111);
	//fflush(stdout);
	return 0;
}