#include<bits/stdc++.h>
namespace {
#pragma GCC diagnostic ignored "-Wunused-function"
#include<atcoder/all>
#pragma GCC diagnostic warning "-Wunused-function"
using namespace std;
using namespace atcoder;
#define rep(i,n) for(int i = 0; i < (int)(n); i++)
#define rrep(i,n) for(int i = (int)(n) - 1; i >= 0; i--)
#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)
template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return true; } else return false; }
template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return true; } else return false; }
using ll = long long;
using P = pair<ll,ll>;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<ll>;
using VVL = vector<VL>;

} int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n, k;
  cin >> n >> k;
  VI h(n);
  rep(i, n) cin >> h[i];
  vector<P> p(n);
  for (auto& [x, y] : p) cin >> x >> y;
  int ans = 0;
  rep(i, n) {
    bool rmv = false;
    rep(j, n) if (h[i] < h[j]) {
      auto [xi, yi] = p[i];
      auto [xj, yj] = p[j];
      ll dx = xi - xj;
      ll dy = yi - yj;
      if (dx * dx + dy * dy <= (ll)k * k) {
        rmv = true;
        break;
      }
    }
    ans += !rmv;
  }
  cout << ans << '\n';
}