n,m=map(int,input().split())
SET=set(range(1,n+1))
FROM=dict()
for i in range(m):
    g,r=map(int,input().split())
    SET.remove(g)
    H=set(map(int,input().split()))
    FROM[g]=H

while SET:
    flag=-1
    for g in FROM:
        if FROM[g]<=SET:
            flag=g
            break

    if flag==-1:
        break
    else:
        SET.add(g)
        del FROM[g]

print(len(SET))