#include <bits/stdc++.h>
using namespace std;
#define rep(i, n) for (int i = 0; i < n; i++)
#define rep2(i, x, n) for (int i = x; i <= n; i++)
#define rep3(i, x, n) for (int i = x; i >= n; i--)
#define each(e, v) for (auto &e : v)
#define pb push_back
#define eb emplace_back
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define sz(x) (int)x.size()
using ll = long long;
using pii = pair<int, int>;
using pil = pair<int, ll>;
using pli = pair<ll, int>;
using pll = pair<ll, ll>;
const int MOD = 1000000007;
// const int MOD = 998244353;
const int inf = (1 << 30) - 1;
const ll INF = (1LL << 60) - 1;
template <typename T>
bool chmax(T &x, const T &y) {
    return (x < y) ? (x = y, true) : false;
}
template <typename T>
bool chmin(T &x, const T &y) {
    return (x > y) ? (x = y, true) : false;
}

struct io_setup {
    io_setup() {
        ios_base::sync_with_stdio(false);
        cin.tie(NULL);
        cout << fixed << setprecision(15);
    }
} io_setup;

template <typename F, typename T = F>
struct Min_Cost_Flow {
    struct edge {
        int to;
        F cap;
        T cost;
        int rev;
        edge(int to, F cap, T cost, int rev) : to(to), cap(cap), cost(cost), rev(rev) {}
    };

    vector<vector<edge>> es;
    vector<T> d, h;
    vector<int> pre_v, pre_e;
    bool negative = false;
    const F INF_F = numeric_limits<F>::max() / 2;
    const T INF_T = numeric_limits<T>::max() / 2;
    const int n;

    vector<int> deg;

    Min_Cost_Flow(int n) : es(n), d(n), h(n), pre_v(n), pre_e(n), n(n), deg(n, 0) {}

    void add_edge(int from, int to, F cap, T cost) {
        es[from].emplace_back(to, cap, cost, (int)es[to].size());
        es[to].emplace_back(from, 0, -cost, (int)es[from].size() - 1);
        deg[to]++;
        if (cost < 0) negative = true;
    }

    void bellman_ford(int s) {
        fill(begin(h), end(h), INF_T);
        h[s] = 0;
        queue<int> que;
        rep(i, n) {
            if (deg[i] == 0) que.emplace(i);
        }
        while (!empty(que)) {
            int i = que.front();
            que.pop();
            each(e, es[i]) {
                if (e.cap == 0) continue;
                chmin(h[e.to], h[i] + e.cost);
                if (--deg[e.to] == 0) que.emplace(e.to);
            }
        }
    }

    void dijkstra(int s) {
        fill(begin(d), end(d), INF_T);
        using P = pair<T, int>;
        priority_queue<P, vector<P>, greater<P>> que;
        que.emplace(d[s] = 0, s);
        while (!que.empty()) {
            auto [p, i] = que.top();
            que.pop();
            if (p > d[i]) continue;
            for (int j = 0; j < (int)es[i].size(); j++) {
                edge &e = es[i][j];
                if (e.cap > 0 && d[i] + e.cost + h[i] - h[e.to] < d[e.to]) {
                    d[e.to] = d[i] + e.cost + h[i] - h[e.to];
                    pre_v[e.to] = i, pre_e[e.to] = j;
                    que.emplace(d[e.to], e.to);
                }
            }
        }
    }

    T min_cost_flow(int s, int t, F flow) {
        T ret = 0;
        if (negative) bellman_ford(s);
        while (flow > 0) {
            dijkstra(s);
            if (d[t] == INF_T) return -1;
            for (int i = 0; i < n; i++) {
                if (h[i] == INF_T || d[i] == INF_T)
                    h[i] = INF_T;
                else
                    h[i] += d[i];
            }
            F f = flow;
            for (int now = t; now != s; now = pre_v[now]) { f = min(f, es[pre_v[now]][pre_e[now]].cap); }
            ret += h[t] * f, flow -= f;
            for (int now = t; now != s; now = pre_v[now]) {
                edge &e = es[pre_v[now]][pre_e[now]];
                e.cap -= f, es[now][e.rev].cap += f;
            }
        }
        return ret;
    }
};

int main() {
    int N, K;
    cin >> N >> K;

    Min_Cost_Flow<int, ll> G(N + 2);

    vector<ll> A(N);
    int s = N, t = N + 1;

    rep(i, N) {
        cin >> A[i];
        int M;
        cin >> M;
        rep(j, M) {
            int x;
            cin >> x;
            x--;
            G.add_edge(x, i, 1, -A[i] + A[x]);
        }
        G.add_edge(s, i, K, A[i]);
    }

    G.add_edge(s, 0, K, 0);
    rep(i, N - 1) G.add_edge(i, i + 1, K, 0);
    G.add_edge(N - 1, t, K, 0);

    cout << -G.min_cost_flow(s, t, K) << '\n';
}