n,k = map(int, input().split())
hlist = list(map(int, input().split()))
import sys
mp = map(int, sys.stdin.read().split())
xy = list(zip(mp,mp))  # ←1行に含まれるデータ数だけmpを連ねる

inf = 1 << 60
dist = [[0 for i in range(n)] for i in range(n)]

k *= k
for i in range(n):
    for j in range(i+1, n):
        xi,yi = xy[i]
        xj,yj = xy[j]
        d = pow(xi-xj, 2) + pow(yi-yj, 2)
        if d <= k:
            if hlist[i] < hlist[j]:
                dist[i][j] = 1
            elif hlist[i] > hlist[j]:
                dist[j][i] = 1
            
        
keys = list(range(n))
keys.sort(key = lambda x:hlist[x])

cnt = n
for key in keys:
    flag = False
    for i in range(n):
        if dist[key][i] == 1:
            flag = True
            break
    
    if flag:
        cnt -= 1

print(cnt)