N,K=map(int,input().split())
H=list(map(int,input().split()))
h=[[H[i],i] for i in range(N)]
h=sorted(h)
xy=[list(map(int,input().split())) for _ in range(N)]
done=[0]*N

for i in range(N):
    for j in range(i+1,N):
        if (xy[h[i][1]][0]-xy[h[j][1]][0])**2 +(xy[h[i][1]][1]-xy[h[j][1]][1])**2 <=K**2 and done[j]==0 and done[i]==0 and h[i][0]!=h[j][0]:
            done[i]=1
            
            break
print(done.count(0))