#include<bits/stdc++.h>
using namespace std;

struct Team{
	int idx;
	int s;
	int p;
	int u;
	int uidx;
	Team() {}
	Team(int idx, int s, int p, int u) : idx(idx),s(s), p(p), u(u) {}
};

int N, K;
vector<Team> teams(100001);
map<int, vector<int>> univ;
int main(){
	cin >> N >> K;
	for(int i = 0; i < N; i++){
		int s, p, u;
		cin >> s >> p >> u;
		Team t(i, s, p, u);
		teams[i] = t;
		univ[u].push_back(i);
	}
	for(auto& uu : univ){
		sort(uu.second.begin(), uu.second.end(),  [] (const int& a, const int& b) -> bool { 
			if(teams[a].s != teams[b].s) return teams[b].s < teams[a].s;
			else return teams[a].p < teams[b].p;
		});
		for(int i = 0; i < uu.second.size(); i++){
			teams[i].uidx = i;
		}
	}
	sort(teams.begin(), teams.end(),  [] (const Team& a, const Team& b) -> bool { 
			if(a.s != b.s) return b.s < a.s;
			else if(a.uidx != b.uidx) return a.uidx < b.uidx;
			else return a.p < b.p;
		});

	for(int i = 0; i < K; i++){
		cout << teams[i].idx <<  endl;
	}
}