#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  ll n, k;
  cin >> n >> k;
  vector<ll> a(n);
  rep(i, n) cin >> a[i];
  vector<pair<ll, ll>> v(n);
  rep(i, n) cin >> v[i].first >> v[i].second;
  int ans = n;
  rep(i, n) rep(j, n) {
    auto [x1, y1] = v[i];
    auto [x2, y2] = v[j];
    if ((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2) <= k * k && a[i] < a[j]) {
      ans--;
      break;
    }
  }
  cout << ans << endl;
  return 0;
}