N,K=map(int,input().split())
H=list(map(int,input().split()))
H=[(H[i],i) for i in range(N)]
H.sort()
Flag=[False for _ in range(N)]
dat=[]
for _ in range(N):
    X,Y=map(int,input().split())
    dat.append((X,Y))
for i in range(N):
    for j in range(i+1,N):
        if H[i][0] < H[j][0]:
            x,y = dat[H[i][1]]
            x2,y2 = dat[H[j][1]]
            if (x2-x)**2  + (y2 - y)**2 <=K**2:
                Flag[i]= True
print(Flag.count(False))