#include <bits/stdc++.h>
using namespace std;
typedef signed long long ll;

#undef _P
#define _P(...) (void)printf(__VA_ARGS__)
#define FOR(x,to) for(x=0;x<(to);x++)
#define FORR(x,arr) for(auto& x:arr)
#define ITR(x,c) for(__typeof(c.begin()) x=c.begin();x!=c.end();x++)
#define ALL(a) (a.begin()),(a.end())
#define ZERO(a) memset(a,0,sizeof(a))
#define MINUS(a) memset(a,0xff,sizeof(a))
//-------------------------------------------------------

int N,K;
int S[101010];
int P[101010];
int U[101010];
int did[101010];
vector<pair<pair<int,int>,int>> E[101010];


void solve() {
	int i,j,k,l,r,x,y; string s;
	
	cin>>N>>K;
	FOR(i,N) {
		cin>>S[i]>>P[i]>>U[i];
		E[U[i]].push_back({{S[i],-P[i]},i});
	}
	priority_queue<pair<pair<int,int>,pair<int,int>>> Q;
	FOR(i,101000) if(E[i].size()) {
		sort(ALL(E[i]));
		x = E[i].back().second;
		E[i].pop_back();
		Q.push({{S[x],0},{-P[x],x}});
	}
	while(K--) {
		auto k=Q.top();
		Q.pop();
		x=k.second.second;
		_P("%d\n",x);
		if(E[U[x]].size()) {
			did[U[x]]++;
			y = E[U[x]].back().second;
			E[U[x]].pop_back();
			Q.push({{S[y],-did[U[y]]},{-P[y],y}});
		}
	}
}


int main(int argc,char** argv){
	string s;int i;
	if(argc==1) ios::sync_with_stdio(false), cin.tie(0);
	FOR(i,argc-1) s+=argv[i+1],s+='\n';
	FOR(i,s.size()) ungetc(s[s.size()-1-i],stdin);
	solve(); return 0;
}