N, K = map(int, input().split())
H = list(map(int, input().split()))
XY = [list(map(int, input().split())) for _ in range(N)]
live = [True] * N

for i in range(N):
    for j in range(i+1, N):
        x1, y1 = XY[i]
        x2, y2 = XY[j]
        dist = ((x1 - x2) ** 2 + (y1 - y2) ** 2) ** 0.5
        if dist <= K:
            if H[i] > H[j]:
                live[j] = False
            elif H[i] < H[j]:
                live[i] = False
print(sum(live))