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

def dist2(a,b):
    r=(a[0]-b[0])**2+(a[1]-b[1])**2
    return r

P=list(range(N))
P.sort(key=lambda x:H[x])
E=[True]*N

for i in P:
    for j in range(N):
        if H[i]>=H[j]:
            continue
        if dist2(XY[i],XY[j])<=K**2:
            E[i]=False
            break

print(sum(E))