#include <iostream>

int l, r;

using namespace std;

bool req(int a){
	cout << "? " << a << endl;
	string s;
	cin >> s;
	return (s == "<");
}

int bs(){
	int m = (l + r) / 2;
	if (req(m))
		l = m;
	else
		r = m;
}

int main()
{
	int n;
	cin >> n;
	l = 1;
	r = n;
	while (r != l + 1)
		bs();
	cout << "! " << r;
	return 0;
}