#include <bits/stdc++.h>

using namespace std;
using ll = int64_t;
using P = std::pair<int, int>;

const int INF = 1e8;

map<int, int> cnt;

struct T {

    int s, p, u;
    int index;

    T(int _s, int _p, int _u, int _index) {
        s = _s;
        p = _p;
        u = _u;
        index = _index;
    }

    bool operator<(const T a) {
        if(a.s > s) {
            return false;
        } 

        if(a.s < s) {
            return true;
        }

        if(a.s == s) {
            if(a.u > u) {
                return false;
            } else {
                return true;
            }
        }
    }

};

struct greater_standing {
    bool operator() (T x, T y) const {
        if(x.s > y.s) {
            return false;
        } 

        if(x.s < y.s) {
            return true;
        }

        if(x.s == y.s) {
            if(cnt[x.u] > cnt[y.u]) {
                return true;
            }

            if(cnt[x.u] < cnt[y.u]) {
                return false;
            }

            if(cnt[x.u] == cnt[y.u]) {
                if(x.p > y.p) {
                    return true;
                } else {
                    return false;
                }
            }

        }
    }
};

int main() {
    ios::sync_with_stdio(false);

    int N, K;
    int S, P, U;
    cin >> N >> K;
    vector<T> v;

    for(int i = 0; i < N; i++) {
        cin >> S >> P >> U;
        v.emplace_back(T(S, P, U, i));
    }

    priority_queue<T, std::vector<T>, greater_standing> queue;

    for(int i = 0; i < N; i++) {
        queue.push(v[i]);
    }

    int c = 0;
    while(c < queue.size()) {
        vector<T> w;
        T a = queue.top();
        queue.pop();
        while(a.s == queue.top().s) {
            w.push_back(queue.top());
            queue.pop();
        }
        int i = a.index;
        cnt[i]++;
        cout << i << endl;

        for(int j = 0; j < w.size(); j++) {
            queue.push(w[j]);
        }

        c++;
    }
}