#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
#define rep(i, n) for(int i=0;i<(n);++i)
#define rep1(i, n) for(int i=1;i<=(n);i++)
#define ll long long
using mint = modint998244353;
using P = pair<ll,ll>;
using lb = long double;
using T = tuple<ll, ll, ll>;
#ifdef LOCAL
#  include <debug_print.hpp>
#  define dbg(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
#  define dbg(...) (static_cast<void>(0))
#endif

int main()
{
    int n, m;
    cin >> n >> m;
    vector<int> a(n), b(m);
    rep(i,n) cin >> a[i];
    rep(i,m) cin >> b[i];
    mf_graph<ll> g(n+m+2);
    int s = n+m;
    int t = n+m+1;
    const ll INF = 1e18;
    rep(i,m){
        int k;
        cin >> k;
        rep(j,k) {
            int c;
            cin >> c;
            --c;
            g.add_edge(c, n+i, INF);
        }
        g.add_edge(n+i, t, b[i]);
    }
    ll ans  = 0;
    rep(i,m)ans+=b[i];
    rep(i,n) {
        g.add_edge(s,i,a[i]);
    }
    ans -= g.flow(s,t);
    cout << ans << endl;
    return 0;
}