N,M = map(int,input().split())
ls = [1]*(N)
dic = dict()
for i in range(M):
    a,b = map(int, input().split())
    l = list(map(lambda x :int(x)-1, input().split()))
    a -= 1
    ls[a] = 0
    dic[a] = l

for _ in range(N):
    for i in dic.keys():
        f = True
        for j in dic[i]:
            if ls[j] == 0:
                f = False
                break
        if f:
            ls[i] = 1
            continue
print(ls.count(1))