#define _USE_MATH_DEFINES
#include <cstdio>
#include <iostream>
#include <sstream>
#include <fstream>
#include <iomanip>
#include <algorithm>
#include <cmath>
#include <complex>
#include <string>
#include <vector>
#include <list>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <bitset>
#include <numeric>
#include <limits>
#include <climits>
#include <cfloat>
#include <functional>
#include <iterator>
using namespace std;

int main()
{
    int n, k;
    cin >> n >> k;

    vector<tuple<int, int, int, int> > v(n);
    for(int i=0; i<n; ++i){
        int s, p, u;
        cin >> s >> p >> u;
        v[i] = make_tuple(s, -p, u, i);
    }

    sort(v.rbegin(), v.rend());
    vector<int> cnt(100000, 0);
    vector<tuple<int, int, int, int> > w(n);
    for(int i=0; i<n; ++i){
        int s, p, u, j;
        tie(s, p, u, j) = v[i];
        w[i] = make_tuple(s, -cnt[u], p, j);
        ++ cnt[u];
    }

    sort(w.rbegin(), w.rend());
    for(int i=0; i<k; ++i)
        cout << get<3>(w[i]) << endl;

    return 0;
}