n, k = map(int, input().split())
h = list(map(int, input().split()))
xy = [list(map(int, input().split())) for _ in range(n)]
g = [[] for _ in range(n)]
d = [0] * n
for i in range(n):
    for j in range(n):
        if h[i] < h[j] and (xy[i][0] - xy[j][0]) ** 2 + (xy[i][1] - xy[j][1]) ** 2 <= k * k:
            g[j].append(i)
            d[i] = 1
print(n - sum(d))