#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <climits>
#include <cassert>
#include <cstdint>
#include <iostream>
#include <iomanip>
#include <string>
#include <stack>
#include <queue>
#include <vector>
#include <map>
#include <set>
#include <algorithm>
#include <numeric>
#include <bitset>

using namespace std;

using ll =  long long;
using Pll = pair<ll, ll>;
using Pii = pair<int, int>;

constexpr ll MOD = 1000000007;
constexpr long double EPS = 1e-10;
constexpr int dyx[4][2] = {
    { 0, 1}, {-1, 0}, {0,-1}, {1, 0}
};

int main() {
    int n, winner;
    cin >> n;
    vector<int> v(2, -1);
    vector<int> lose(n+1, -1);
    v[0] = 1;
    for(int i=2;i<=n;++i) {
        cout << "? " << v[0] << ' ' << i << endl;
        cin >> winner;
        if(winner == i) {
            lose[v[0]] = i;
            v[0] = i;
        } else {
            lose[i] = v[0];
        }
    }

    vector<int> cand;
    for(int i=1;i<=n;++i) {
        if(lose[i] == v[0]) {
            cand.push_back(i);
        }
    }

    v[1] = cand[0];
    for(int i=1;i<cand.size();++i) {
        if(cand[i] == v[0]) continue;
        cout << "? " << v[1] << ' ' << cand[i] << endl;
        cin >> winner;
        if(winner == cand[i]) {
            v[1] = cand[i];
        }
    }

    cout << "! " << v[1] << endl;
}