n,x,q=map(int,input().split())
ans=0
for _ in range(q):
	m=int(input())
	L=list(map(int,input().split()))
	S=set(L)
	if x in S:
		ans+=1
		continue
	elif len(S)==m:
		pass
	else:
		ans+=0.5
print(ans)