#41833: python AC 解
deansuo1825@gmail.com
(黃昱碩)
a,b=map(int,input().split())
n=int(input())
total=0
for i in range(n):
counter=[int(x) for x in input().split()]
if counter.count(a)-counter.count(-a)>0 and counter.count(b)-counter.count(-b)>0:
total+=1
print(total)