#include <bits/stdc++.h>
int main()
{
    int N;
    std::cin >> N;
    using P = std::pair<int, int>;
    using PP = std::pair<int, P>;
    std::vector<PP> s;
    std::map<PP, int> mp;
    for (int i = 0, x, y, z; i < N; i++) { std::cin >> x >> y >> z, s.push_back({-x, {y, z}}), mp[s.back()] = i + 1; }
    std::sort(s.begin(), s.end());
    std::map<P, int> mp2;
    for (const auto& pp : s) {
        if (mp2.find(pp.second) == mp2.end()) { mp2[pp.second] = mp[pp]; }
    }
    std::set<int> ans;
    std::set<P> ps;
    for (const auto& q : s) {
        const P p = q.second;
        auto it = ps.lower_bound(p);
        if (it != ps.end() and it->second >= p.second) { continue; }
        ans.insert(mp2[p]);
        std::vector<P> er;
        it = ps.upper_bound(p);
        if (it != ps.begin()) {
            it--;
            for (; it->second <= p.second; it--) {
                er.push_back(*it);
                if (it == ps.begin()) { break; }
            }
            for (const auto& e : er) { ps.erase(e); }
        }
        ps.insert(p);
    }
    for (const int i : ans) { std::cout << i << std::endl; }
    return 0;
}