#include "bits/stdc++.h"
#include "icc.h"
using namespace std;

struct dsu {
    vector<int> p;
    vector<vector<int>> d;

    dsu(int n) {
        p.resize(n);
        d.resize(n);
        for (int i = 0; i < n; i++) {
            p[i] = i;
            d[i] = {i};
        }
    }

    int get(int u) {
        if (u == p[u]) {
            return u;
        } else {
            return p[u] = get(p[u]);
        }
    }

    void join(int u, int v) {
        u = get(u);
        v = get(v);
        if (u == v) {
            return;
        }
        if (d[v].size() > d[u].size()) {
            swap(u, v);
        }
        p[v] = u;
        d[u].insert(d[u].end(), d[v].begin(), d[v].end());
        d[v].clear();
    }
};

void run(int n) {
    dsu Q(n + 1);
    auto loop = [&]() {
        for (int u = 1; u <= n; u++) {
            for (int v = 1; v <= n; v++) {
                if (Q.get(u) != Q.get(v)) {
                    int x = min(u, v);
                    int y = max(u, v);
                    if (query(1, 1, &x, &y)) {
                        setRoad(x, y);
                        Q.join(x, y);
                        return;
                    }
                }
            }
        }
    };
    for (int i = 0; i < n - 1; i++) {
        loop();
    }
}

#ifdef LOCAL
int main() {
    int n;
    cin >> n;
    run(n);
}
#endif