Guess.cpp

#include<bits/stdc++.h>
using namespace std;

string chute(int x){
	cout << x << endl;

	string rt; cin >> rt;
	return rt;
}

int main(){
	int l = 1, r = 1000000, ans = 1;
	while(l<=r){
		int mid = (l+r)>>1;
		if(chute(mid)==">=") l = mid+1, ans = mid;
		else r = mid-1;
	}

	cout << "! " << ans << '\n';
}