#include <bits/stdc++.h>
using namespace std;
#define repl(i, l, r) for (int i = (l); i < (int)(r); ++i)
#define rep(i, n) repl(i, 0, n)
#define CST(x) cout << fixed << setprecision(x)
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size()
using ll = long long;
constexpr ll MOD = 1000000007;
constexpr int inf = 1e9 + 10;
constexpr ll INF = (ll)4e18 + 10;
constexpr int dx[9] = {1, 0, -1, 0, 1, -1, -1, 1, 0};
constexpr int dy[9] = {0, 1, 0, -1, 1, 1, -1, -1, 0};
const double PI = acos(-1);
template <typename T>
using MaxHeap = priority_queue<T>;
template <typename T>
using MinHeap = priority_queue<T, vector<T>, greater<T>>;
template <typename T>
inline bool chmax(T &a, T b) {
    return ((a < b) ? (a = b, true) : (false));
}
template <typename T>
inline bool chmin(T &a, T b) {
    return ((a > b) ? (a = b, true) : (false));
}
template <typename T>
inline void yn(const T &a) {
    ((a) ? (cout << "Yes" << endl) : (cout << "No" << endl));
}
template <typename T>
inline void YN(const T &a) {
    ((a) ? (cout << "YES" << endl) : (cout << "NO" << endl));
}
void query(const int &x, const int &y) { cout << "? " << x << " " << y << endl; }
int n;
int tournament(const vector<int> &v, vector<int> &nv) {
    vector<vector<int>> opp(n + 1);
    queue<int> que;
    for (const auto &e : v) que.push(e);
    while (que.size() > 1) {
        int a = que.front();
        que.pop();
        int b = que.front();
        que.pop();
        query(a, b);
        opp[a].emplace_back(b), opp[b].emplace_back(a);
        int t;
        cin >> t;
        que.push(t);
    }
    int res = que.front();
    nv = opp[res];
    return res;
}
int main() {
    cin.tie(nullptr);
    cout.tie(nullptr);
    ios::sync_with_stdio(false);

    cin >> n;

    vector<int> v(n);
    iota(all(v), 1);

    vector<int> nv;

    tournament(v, nv);

    v.assign(n, 0);

    int ans = tournament(nv, v);

    cout << "! " << ans << endl;

    return 0;
}