#include <cstdio>
#include <algorithm>
#include <iostream>
#include <vector>
#include <iomanip>
#include <typeinfo>
#include <string>
using namespace std;

struct team{
  int t,s,p,u,m;

  bool operator<( const team& right ) const {

    if(s!=right.s) return s > right.s;
    //if(p!=right.p) return p < right.p;
    //return s > right.s;
    if(m!=right.m) return m < right.m;
    return p < right.p;
    
  }

};


int mm[101010];
int main(void){
  
  int n,k,i;

  cin>>n>>k;
  vector<team> a(n);  
  for(i=0;i<n;i++){
    a[i].t=i;
    cin>>a[i].s>>a[i].p>>a[i].u;
    a[i].m=0;
    mm[i]=0;
  }

  //cout<<endl;

  sort(a.begin(),a.end());
  
  for(i=0;i<n;i++){
    a[i].m=++mm[a[i].u];
  }
  /*
  for(i=0;i<n;i++){
    //a[i].t=i;
    cout<<a[i].t<<" "<<a[i].s<<" "<<a[i].p<<" "<<a[i].u<<" "<<a[i].m<<endl;

  }
  
  cout<<endl;
  */
  sort(a.begin(),a.end());
  /*
  for(i=0;i<n;i++){
    //a[i].t=i;
    cout<<a[i].t<<" "<<a[i].s<<" "<<a[i].p<<" "<<a[i].u<<" "<<a[i].m<<endl;

  }
  */
  for(i=0;i<k;i++) cout<<a[i].t<<endl;
  //cout<<endl;
  return 0;
}