N,K=map(int,input().split())
H=list(map(int,input().split()))
X,Y=[],[]
for i in range(N):
    x,y=map(int,input().split())
    X.append(x)
    Y.append(y)
bl=[1]*N
for i in range(N):
    for j in range(N):
        if H[i]<H[j] and (X[i]-X[j])**2+(Y[i]-Y[j])**2<=K**2:
            bl[i]=0
ans=sum(bl)
print(ans)