n,K=map(int,input().split())
h=list(map(int,input().split()))
p=[tuple(map(int,input().split())) for i in range(n)]
d=[0]*n
for i in range(n):
  for j in range(n):
    if i==j:
      continue
    x1,y1=p[i]
    x2,y2=p[j]
    if (x1-x2)**2+(y1-y2)**2<=K**2:
      if h[i]<h[j]:
        d[i]=1
      if h[j]<h[i]:
        d[j]=1
print(d.count(0))