#include <bits/stdc++.h>
#define int long long
//#define USE_FREOPEN
//#define MUL_TEST
#define FILENAME "difficulty"
using namespace std;
int x[100005];
vector<int> a[100005], b[100005];
int cnt[6];

void solve() {
	int n, m;
	cin >> n >> m;
	for (int i = 1; i <= n; i++) {
		int ai, bi;
		cin >> x[i] >> ai >> bi;
		a[ai].push_back(i);
		b[bi].push_back(i);
		x[i]++;
		cnt[x[i]]++;
	}
	
	int ans = 9e18;
	int sb = 100001;
	for (int sa = 0; sa <= 100001; sa++) {
		while (cnt[2] + cnt[3] + cnt[4] + cnt[5] < m) {
			sb--;
			if (sb < 0) break;
			for (auto i : b[sb]) {
				cnt[x[i]]--;
				x[i]++;
				cnt[x[i]]++;
			}
		}
		if (cnt[2] + cnt[3] + cnt[4] + cnt[5] < m) break;
		ans = min(ans, cnt[3] + cnt[4] + cnt[5]);
		for (auto i : a[sa]) {
			cnt[x[i]]--;
			x[i]--;
			cnt[x[i]]++;
		}
	}
	cout << ans << '\n';
}

signed main() {
	ios::sync_with_stdio(false);
	cin.tie(nullptr); cout.tie(nullptr);

	#ifdef USE_FREOPEN
		freopen(FILENAME ".in","r",stdin);
		freopen(FILENAME ".out","w",stdout);
	#endif
	int _ = 1;
	#ifdef MUL_TEST
		cin >> _;
	#endif
	while (_--)
		solve();
	_^=_;
	return 0^_^0;
}