using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace yuki_433
{
    class Program
    {
        static int N, K;
        static HashSet<University> L = new HashSet<University>();
        static int[] C = new int[100001];
        static bool flag;
        static int Counter;

        static void Main(string[] args)
        {
            var sb = new StringBuilder();
            var t = scan;
            N = t[0]; K = t[1];


            for (int i = 0; i < N; i++)
            {
                t = scan;
                L.Add(new University(i, t[0], t[1], t[2]));
            }

            var A = L.OrderByDescending(l => l.S).ToArray();
            var d = 0;
            var T = A;
            L = new HashSet<University>();

            while (true)
            {
                T = A.Skip(d).ToArray();
                int cnt = LowerBound(T, T[0].S);
                //Console.WriteLine(cnt);
                T = T.Take(cnt).ToArray();
           

           
                d += cnt;

                //Console.WriteLine(T.Count()+" "+T[0].S);
                
                
                var nowU = -1;
                T = T.OrderBy(a => C[a.U]).ThenBy(a => a.P).ToArray();
                var Q = new Queue<University>();
                for (int i = 0; i < cnt; i++)
                {
                    Q.Enqueue(T[i]);
                }


                while (Q.Any())
                {
                    var g = Q.Dequeue();
                    if(g.U == nowU)
                    {
                        Q.Enqueue(g);
                        continue;
                    }
                    sb.AppendLine(g.Num.ToString());
                    C[g.U]++;
                    Counter++;
                    if(Counter == K)
                    {
                        flag = true;
                        break;
                    }
                }

                if (flag)
                {
                    Console.Write(sb);
                    return;
                }

            }

            
        }
        class University
        {
            internal int Num, S, P, U;
            public University(int Num, int S, int P, int U)
            {
                this.Num = Num;
                this.S = S;
                this.P = P;
                this.U = U;
            }
        }

        static int LowerBound(University[] arr, int val)
        {
            int low = 0, high = arr.Count();
            int mid;

            while (low < high)
            {
                mid = ((high - low) >> 1) + low;
                if (arr[mid].S >= val) low = mid + 1;
                else high = mid;
            }
            return low;
        }

        static int[] scan { get { return Array.ConvertAll(Console.ReadLine().Split(), int.Parse); } }
    }
}