#include<iostream>
#include<vector>
#include<cmath>
#include<climits>
#include<algorithm>

#include<tuple>

using namespace std;  
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
#define rep(i,n) for(ll i=0;i<(n);i++)  
#define pii pair<int,int>
#define piii pair<int,pii>
#define mp make_pair
#define pb push_back  
#define ALL(a) (a).begin(),(a).end()
#define FST first
#define SEC second  
const int INF = (INT_MAX/2);
const ll LLINF = (LLONG_MAX/2);
const double eps = 1e-5;
const double PI = M_PI;  
#define DEB cerr<<"!"<<endl
#define SHOW(a,b) cerr<<(a)<<" "<<(b)<<endl
#define SHOWARRAY(ar,i,j) REP(a,i)REP(b,j)cerr<<ar[a][b]<<((b==j-1)?((a==i-1)?("\n\n"):("\n")):(" "))

#define mt make_tuple

typedef tuple<int,int> tii;
vector<int> x(100001);
int main(){
  int n,m; cin >> n >> m;
  vector<tii> a;
  vector<tii> b;
  rep(i,n){
    int xx,aa,bb; cin >> xx >> aa >> bb;
    a.pb(tii{i,aa});
    b.pb(tii{i,bb});
    x[i] = xx+1;
  }
  sort(ALL(a),[](tii a,tii b){return get<1>(a) < get<1>(b);});
  sort(ALL(b),[](tii a,tii b){return get<1>(a) < get<1>(b);});
  int ans = INF;
  int now_a = -1, now_b = 100001;
  int a_index = 0, b_index = n-1;
  int cnt[6] = {};
  rep(i,n){cnt[x[i]]++;}
  
  while(now_a < 100001 && now_b >= -1){
    // SHOW(now_a,now_b);
    // rep(i,6)cerr <<" "<<cnt[i]; cerr<<endl;
    if(cnt[2]+cnt[3]+cnt[4]+cnt[5] >= m){
      ans = min(ans,cnt[3]+cnt[4]+cnt[5]);
      now_a++;
      for(;a_index < n && get<1>(a[a_index]) < now_a; a_index++){
        cnt[x[get<0>(a[a_index])]]--;
        x[get<0>(a[a_index])]--;
        cnt[x[get<0>(a[a_index])]]++;
      }
    }else{
      now_b--;
      for(;b_index >= 0 && get<1>(b[b_index]) > now_b; b_index--){
        cnt[x[get<0>(b[b_index])]]--;
        x[get<0>(b[b_index])]++;
        cnt[x[get<0>(b[b_index])]]++;
      }
    }
  }
  
  cout << ans << endl;
}