n,m = map(int,input().split())
goods = [[]for i in range(n+1)]

def search(i):
    if goods[i]==-1:
        return False
    else:
        tmp = goods[i][:]
        goods[i] = -1
        for j in tmp:
            if search(j):goods[j]=[]
            else:
                return False
        return True

for i in range(m):
    g,r = map(int,input().split())
    h = list(map(int,input().split()))
    goods[g] = h

cnt = 0
for i in range(1,n+1):
    if search(i):
        goods[i] = []
    else:
        cnt+=1

print(n-cnt)