def dist2(p1, p2):
  return abs(p1[0]-p2[0])**2 + abs(p1[1]-p2[1])**2

N, K = map(int, input().split())
H = tuple(map(int, input().split()))
P = tuple(tuple(map(int, input().split())) for _ in range(N))

def ng(i, j):
  if H[i] >= H[j]:
    return False
  if dist2(P[i], P[j]) > K**2:
    return False
  return True

idx = sorted(range(N), key=H.__getitem__)
ok = [1]*N
for i in range(N):
  if any(ng(idx[i], idx[j]) for j in range(i+1, N)):
    ok[idx[i]] = 0

print(sum(ok))