#include <bits/stdc++.h>

using namespace std;
using ll = long long;
using ld = long double;

const int maxn = 3e5 + 10;
const int mod = 1e9 + 7;

int ask(int i, int j) {
	cout << "? " << i << " " << j + 1 << endl;
	string resp;
	cin >> resp;
	return resp == "absent";
}

int main()
{
	ios_base::sync_with_stdio(false), cin.tie(0);
	int n;
	cin >> n;
	int start = 0, answer = 0;
	while (start < n) {
		int it = start;
		while (it < n && !ask(start, it)) {
			it++;
		} 
		if (it >= n) {
			break;
		}
		answer++;
		start = it + 1;
	}

	cout << "! " << answer << endl;
 	return 0;
}