n,k=map(int,input().split())
H=list(map(int,input().split()))
L=[list(map(int,input().split())) for _ in range(n)]
ans=n
for i in range(n):
	for j in range(n):
		if H[i]<H[j]:
			x,y=L[i]
			x2,y2=L[j]
			if (x-x2)**2+(y-y2)**2<=k**2:
				ans-=1
				break
print(ans)