#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define rep(i, s, e) for (int i = (int)(s); i < (int)(e); ++i)
#define all(a) (a).begin(),(a).end()

#include <atcoder/maxflow>
using namespace atcoder;

int main() {
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);
    
    int N, M;
    cin >> N >> M;
    ll sum = 0;
    mf_graph<ll> G(N + M + 2);
    rep(i, 0, N) {
        ll A;
        cin >> A;
        G.add_edge(N + M, i, A);
    }
    rep(i, 0, M) {
        ll B;
        cin >> B;
        sum += B;
        G.add_edge(i + N, N + M + 1, B);
    }
    rep(i, 0, M) {
        int K;
        cin >> K;
        rep(j, 0, K) {
            int C;
            cin >> C;
            --C;
            G.add_edge(C, N + i, 1ll << 60);
        }
    }
    
    cout << sum - G.flow(N + M, N + M + 1) << '\n';
}