n,m=map(int,input().split())
h=list(map(int,input().split()))
g=[list(map(int,input().split())) for _ in range(n)]
delete=[False]*n
for i in range(n):
  for j in range(n):
    if i==j:
      continue
    if h[i]<h[j] and (g[i][0]-g[j][0])**2+(g[i][1]-g[j][1])**2<=m*m:
      delete[i]=True
print(delete.count(False))