from collections import *
from itertools import *
from functools import cache, partial
from pprint import pprint
import sys
from typing import Any, Final

try:
    from icecream import ic
except ImportError:  # Graceful fallback if IceCream isn't installed.
    ic = lambda *a: None if not a else (a[0] if len(a) == 1 else a)  # noqa
debug = partial(print, file=sys.stderr)
dpprint = partial(pprint, stream=sys.stderr)
sys.setrecursionlimit(10**6)
MOD = 998244353

N, K = list(map(int, input().split()))
H_ = list(map(int, input().split()))
H = [(h, i) for i, h in enumerate(H_)]
H.sort()
# ic(H)
XY = []
for _ in range(N):
    x, y = map(int, input().split())
    XY.append((x, y))

destroied = [False] * N
for s, t in groupby(H, key=lambda x: x[0]):
    T = set([x for _, x in t])
    # ic(s, T)
    for i in T:
        xi, yi = XY[i]
        for j, (x, y) in enumerate(XY):
            if j in T:
                continue
            if destroied[j]:
                continue
            xj, yj = x, y
            if (xi - xj) ** 2 + (yi - yj) ** 2 <= K**2:
                destroied[i] = True
                break

# ic(destroied)
ans = N - sum(destroied)
print(ans)