#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
using i64 = long long;
using u64 = unsigned long long;
#define rep(i,n) for(int i=0; i<int(n); i++)
#define repr(i,n) for(int i=int(n)-1; i>=0; i--)
const i64 INF = 1001001001001001001;
#include <atcoder/maxflow>
using namespace std;

int main(){
    ios::sync_with_stdio(false); cin.tie(nullptr);
    int N, M; cin >> N >> M;
    vector<i64> A(N), B(M);
    rep(i,N) cin >> A[i];
    rep(i,M) cin >> B[i];
    auto mf = atcoder::mf_graph<i64>(N+M+2);
    int src = N+M, snk = N+M+1;
    i64 offset = 0;
    rep(i,N) mf.add_edge(i, snk, A[i]);
    rep(i,M){
        offset += B[i];
        mf.add_edge(src, N+i, B[i]);
    }
    rep(i,M){
        int K; cin >> K;
        rep(k,K){
            int c; cin >> c; c--;
            mf.add_edge(N+i, c, INF);
        }
    }
    auto ans = mf.flow(src, snk);
    ans = offset - ans;
    cout << ans << '\n';
    return 0;
}