n, k = map(int, input().split())
h = list(map(int, input().split()))

d = [0] * n
for i in range(n):
    x, y = map(int, input().split())
    d[i] = [x, y]

ans = n

for i in range(n):
    for j in range(n):
        x1, y1 = d[i]
        x2, y2 = d[j]
        t = ((x1 - x2) ** 2 + (y1 - y2) ** 2 ) ** 0.5
        if t <= k and h[i] < h[j]:
            ans -= 1
            break

print(ans)