N,X,Q = map(int,input().split())
ans = 0
for i in range(Q):
	M = int(input())
	F = list(map(int,input().split()))
	p = 0
	flag = False
	st = set()
	for j in range(M):
		if(F[j] == X):
			p = 1
		if(F[j] in st):
			flag = True
		st.add(F[j])
	if(p == 0 and flag == True):
		p = 0.5
	ans += p
print(ans)