N,K=map(int,input().split())
H=list(map(int,input().split()))
XY=[list(map(int,input().split())) for i in range(N)]

USE=[0]*N

for i in range(N):
    for j in range(N):
        x,y=XY[i]
        z,w=XY[j]

        if (x-z)**2 + (y-w)**2 <=K*K:
            if H[i]<H[j]:
                USE[i]=1
            if H[j]<H[i]:
                USE[j]=1

print(N-sum(USE))