N, K = map(int, input().split())
H = list(map(int, input().split()))
X, Y = map(list, zip(*[map(int, input().split()) for _ in range(N)]))

to = [[] for _ in range(N)]
for i in range(N):
    for j in range(N):
        if H[i] < H[j] and (X[i]-X[j])**2+(Y[i]-Y[j])**2 <= K**2:
            to[i].append(j)

out = [len(to[i]) for i in range(N)]
print(sum(1 for i in range(N) if out[i] == 0))