import sys
input = sys.stdin.readline

N,K=map(int,input().split())
H=list(map(int,input().split()))
XY=[list(map(int,input().split())) for _ in range(N)]
K2=K*K

Exist = [1]*N

Hi = sorted(list(enumerate(H)), key=lambda x:x[1])
for i,h in Hi:
    if Exist[i]==0:continue
    for j in range(N):
        if i==j:continue
        if h<=H[j]:continue
        if Exist[j]==0:continue
        if (XY[i][0]-XY[j][0])**2+(XY[i][1]-XY[j][1])**2 <= K2:
            Exist[j] = 0
print(sum(Exist))