#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using ll = long long;
#define rep(i, n) for (int i = 0; i < int(n); i++)

int main() {
  int n, k;
  cin >> n >> k;
  vector<ll> a(n);
  vector<int> m(n);
  vector<vector<int>> b(n);

  rep(i, n) {
    cin >> a[i] >> m[i];
    b[i].resize(m[i]);
    rep(j, m[i]) cin >> b[i][j], b[i][j]--;
  }

  atcoder::mcf_graph<int, ll> G(n);
  const ll M = 1e9;

  rep(i, n) {
    for (auto j : b[i]) G.add_edge(j, i, 1, a[j] - a[i] + (i - j) * M);
  }
  rep(i, n - 1) G.add_edge(i, i + 1, n, M);

  cout << M * (n - 1) * k - G.flow(0, n - 1, k).second << "\n";
}