N, X, Q = map(int, input().split())
M = []
F = []
for _ in range(Q):
    M.append(int(input()))
    F.append(list(map(int, input().split())))

ans = 0
for i in range(Q):
    if X in F[i]:
        ans += 1
    elif len(set(F[i])) < M[i]:
        ans += 0.5

print(ans)