import java.io.PrintStream;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;
import java.util.PriorityQueue;
import java.util.Scanner;


public class Y433 {
	Y433() throws Exception {
		Scanner in = new Scanner(System.in);
		PrintStream out = new PrintStream(System.out);
		
		int n = in.nextInt();
		int k = in.nextInt();
		
		School[] school = new School[100001];
		for (int i = 0; i < 100001; i++) {
			school[i] = new School();			
		}
		
		for (int i = 0; i < n; i++) {
			int s = in.nextInt();
			int p = in.nextInt();
			int u = in.nextInt();
			school[u].add(new Team(s, p, i));
		}
	

		PriorityQueue<School> pq = new PriorityQueue<>();

		for (int i = 0; i < 100001; i++) {
			if (school[i].teams.size() > 0) {
				school[i].sort();
				pq.add(school[i]);
			}
		}

		for (int i = 0; i < k; i++) {
			School sch = pq.poll();
			Team team = sch.getLast();
			
			out.println(sch.getLast().name);
			sch.pop();
			if (sch.teams.size() > 0) {
				pq.add(sch);
			}
		}
		

	}
	
	class Team implements Comparable {
		int s, p, name;
		
		Team(int s, int p, int name) {
			this.s = s;
			this.p = p;
			this.name = name;
		}

		@Override
		public int compareTo(Object o) {
			Team that = (Team) o;
			if (s != that.s) return Integer.compare(s, that.s);
			return Integer.compare(that.p, p);
		}
	}

	class School implements Comparable {

		int passed;
		List<Team> teams;
		
		School() {
			passed = 0;
			teams = new ArrayList();
		}

		void add(Team t) {
			teams.add(t);
		}
		
		Team pop() {
			Team team = getLast();
			teams.remove(teams.size() - 1);
			passed++;
			return team;
		}
		
		void sort() {
			teams.sort(null);
		}
		
		Team getLast() {
			return teams.get(teams.size() - 1);
		}
		
		@Override
		public int compareTo(Object o) {
			School that = (School) o;
			
			if (getLast().s != that.getLast().s) return Integer.compare(that.getLast().s, getLast().s);
			if (passed != that.passed) return Integer.compare(passed, that.passed);  
			return Integer.compare(getLast().p, that.getLast().p);
		}
		
	}
	
	public static void main(String argv[]) throws Exception {
		new Y433();
	}
}