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)]
for i in range(N):
    H[i] = [H[i], i]
H.sort()
cnt = 0
for i in range(N):
    hi, ii = H[i]
    xi, yi = XY[ii]
    for j in range(i+1, N):
        hj, jj = H[j]
        if hi==hj:
            continue
        xj, yj = XY[jj]
        if (xi-xj)**2+(yi-yj)**2<=K**2:
            cnt += 1
            break
print(N-cnt)