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

if P%2 + Q%2 == 1:
    print(N)
    exit()
else:
    cnt = 0
    for i in range(N):
        x,y = map(int, input().split())
        if x%2 + y%2 == 0:
            cnt += 1
    print(cnt)