import sys
input = sys.stdin.readline

from collections import Counter

N,X,Q=map(int,input().split())

ANS=0

for tests in range(Q):
    M=int(input())
    L=Counter(map(int,input().split()))

    if X in L:
        ANS+=1
    else:
        for c in L:
            if L[c]>=2:
                ANS+=0.5
                break

print(ANS)