#include<bits/stdc++.h>
using namespace std;

//* ATCODER
#include<atcoder/all>
using namespace atcoder;
typedef modint998244353 mint;
//*/

/* BOOST MULTIPRECISION
#include<boost/multiprecision/cpp_int.hpp>
using namespace boost::multiprecision;
//*/

typedef long long ll;

#define rep(i, s, n) for (int i = (int)(s); i < (int)(n); i++)
#define rrep(i, s, n) for (int i = (int)(n)-1; i >= (int)(s); i--)

template <typename T> bool chmin(T &a, const T &b) {
	if (a <= b) return false;
	a = b;
	return true;
}

template <typename T> bool chmax(T &a, const T &b) {
	if (a >= b) return false;
	a = b;
	return true;
}

template <typename T> T max(vector<T> &a){
	assert(!a.empty());
	T ret = a[0];
	for (int i=0; i<(int)a.size(); i++) chmax(ret, a[i]);
	return ret;
}

template <typename T> T min(vector<T> &a){
	assert(!a.empty());
	T ret = a[0];
	for (int i=0; i<(int)a.size(); i++) chmin(ret, a[i]);
	return ret;
}

template <typename T> T sum(vector<T> &a){
	T ret = 0;
	for (int i=0; i<(int)a.size(); i++) ret += a[i];
	return ret;
}

int main(){
	int n, m; cin >> n >> m;
	vector<ll> a(n), b(m);
	rep(i,0,n) cin >> a[i];
	rep(i,0,m) cin >> b[i];

	mf_graph<ll> mf(n + m + 2);
	rep(i,0,n){
		mf.add_edge(i, n + m + 1, a[i]);
	}

	ll geta = sum(b);
	rep(i,0,m){
		mf.add_edge(n + m, i + n, b[i]);
	}
	

	ll INF = 1e13;
	rep(i,0,m){
		int k; cin >> k;
		rep(j,0,k){
			int x; cin >> x;
			x--;
			mf.add_edge(i + n, x, INF);
		}
	}
	cout << geta - mf.flow(n + m, n + m + 1) << '\n';
}