from collections import deque

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

K **= 2
def distance(x1, y1, x2, y2):
    return (x2-x1)**2 + (y2-y1)**2

H2 = sorted([(i, H[i]) for i in range(N)], key=lambda x:x[1], reverse=True)

ans = 0
visited = [False]*N
for idx, h in H2:
    if visited[idx]:
        continue
    ans += 1
    visited[idx] = True
    que = deque()
    que.append(idx)
    while que:
        n = que.popleft()
        X1, Y1 = XY[n]
        for i in range(N):
            X2, Y2 = XY[i]
            if not visited[i] and H[n] > H[i] and distance(X1, Y1, X2, Y2) <= K:
                visited[i] = True
                que.append(i)

print(ans)