N,K=map(int,input().split())
H=list(map(int,input().split()))
pos=[tuple(map(int,input().split())) for i in range(N)]
ok=[1]*N
for i in range(N):
	for j in range(N):
		if H[i]<H[j] and ((pos[i][0]-pos[j][0])**2)+((pos[i][1]-pos[j][1])**2)<=K**2:
			ok[i]=0
print(sum(ok))