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

#define SZ(a) (int)a.size()
#define ALL(a) a.begin(), a.end()
#define FOR(i, a, b) for (int i = (a); i<(b); ++i)
#define RFOR(i, b, a) for (int i = (b)-1; i>=(a); --i)
#define MP make_pair
#define PB push_back
#define F first
#define S second
#define FILL(a, b) memset(a, b, sizeof(a))

typedef long long LL;
typedef pair<int, int> PII;
typedef vector<int> VI;

const int INF = 1e9 + 7;

int main()
{
	//ios::sync_with_stdio(false);
	//cin.tie(0);
	
	int n;
	cin >> n;
	
	int cnt = 0;
	int l = 0;
	string s;
	FOR (i, 0, n)
	{
		cout << "? " << l << ' ' << i + 1 << endl;
		cin >> s;
		if (s == "absent")
		{
			cnt++;
			l = i + 1;
		}
	}
	cout << "! " << cnt << endl;
	 
	return 0;
}