from collections import*
n,x,q=map(int,input().split())
ans=0
for _ in range(q):
  m=int(input())
  f=[*map(int,input().split())]
  d=Counter()
  p=0
  for i in f:
    if i==x:
      p=1
      break
    d[i]+=1
    if d[i]>1:
      p=0.5
  ans+=p
print(ans)