N, K = map(int, input().split())
H = list(map(int, input().split()))
XY = [tuple(map(int, input().split())) for _ in range(N)]
I = sorted(range(N), key=lambda i: H[i])
ans = N
for i in I:
    for j in I:
        if H[i] >= H[j]:
            continue
        xi, yi = XY[i]
        xj, yj = XY[j]
        dx = xi - xj
        dy = yi - yj
        if dx * dx + dy * dy <= K * K:
            ans -= 1
            break
print(ans)