## https://yukicoder.me/problems/no/2713

from atcoder.maxflow import MFGraph

MAX_CAPACITY = 10 ** 18

def main():
    N, M = map(int, input().split())
    A = list(map(int, input().split()))
    B = list(map(int, input().split()))
    values = []
    for _ in range(M):
        t = tuple(map(int, input().split()))
        values.append(t)
    
    # 燃やす埋める問題として解く

    mf_graph = MFGraph(2 + N + M)

    for i in range(N):
        mf_graph.add_edge(0, 1 + i, A[i])
    for i in range(M):
        mf_graph.add_edge(1 + N + i, 1 + N + M, B[i])
    
    for from_i in range(M):
        v = values[from_i]
        for to_i in v[1:]:
            mf_graph.add_edge(to_i, 1 + N + from_i, MAX_CAPACITY)
    
    ans = mf_graph.flow(0, 1 + N + M)
    print(sum(B) - ans)






if __name__ == "__main__":
    main()