#include <bits/stdc++.h>
using namespace std;
#define int long long

const int N = 100010;

int n, m, a[N], x[N], b[N], ha[10];
vector<int> va[N], vb[N];

signed main()
{
	ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	cin >> n >> m;
	for (int i = 1; i <= n; i ++ ) cin >> x[i] >> a[i] >> b[i];
	for (int i = 1; i <= n; i ++ )
	{
		vb[b[i]].emplace_back(i);
		va[a[i]].emplace_back(i);
		x[i] ++ ;
	}
	for (int i = 1; i <= n; i ++ ) ha[x[i]] ++ ;
	int sb = 100001, res = 1e18;
	for (int sa = 0; sa <= 100001; sa ++ )
	{
		while (sb)
		{
			if (ha[2] + ha[3] + ha[4] + ha[5] >= m) break;
			sb -- ;
			for (auto i : vb[sb]) ha[x[i]] -- , ha[ ++ x[i]] ++ ;
		}
		if (ha[2] + ha[3] + ha[4] + ha[5] < m) break;
		res = min(res, ha[3] + ha[4] + ha[5]);
		for (auto i : va[sa])
			ha[x[i]] -- , ha[ -- x[i]] ++ ;
	}
	cout << res;
	return 0;
}