n, k = map(int, input().split())
hl = list(map(int, input().split()))
xyl = [list(map(int, input().split())) for _ in range(n)]

k2 = k**2

exists = [True] * n
for i, h1 in enumerate(hl):
    x1, y1 = xyl[i]
    for j, h2 in enumerate(hl):
        if h1 <= h2:
            continue
        x2, y2 = xyl[j]
        d2 = (x1 - x2)**2 + (y1 - y2)**2
        if d2 <= k2:
            exists[j] = False
print(sum(exists))