remote交到cf uke了

因为问题太水了所以来灌水区问了

#include<bits/stdc++.h>
using namespace std;
int n;
inline int Ask(int x,int y){
	printf("? %d %d",x,y);
	fflush(stdout);
	int p;
	scanf("%d",&p);
	return p;
}
inline void write(int x){
	printf("! %d",x);
	fflush(stdout);
	return ;
}
int main(){
	scanf("%d",&n);
	int l=1,r=n;
	int mid;
	while(l<r){
		mid=Ask(l,r);
		if(r-l+1==2)break;
		if(Ask(l,mid)==mid)l=mid+1;
		else r=mid;
	}
	write(mid);
	return 0;
}