#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using namespace std;
#define rep(i, n) for (ll i = 0; i < (ll)(n); i++)
#define rep2(i, k, n) for (ll i = (ll)(k); i < (ll)(n); i++)
#define repM(i, k, n) for (ll i = (ll)(k); i > (ll)(n); i--)
#define all(v) v.begin(), v.end()
using ll = long long;
ll mod = 998244353;

int main() {
  ll N, K;
  cin >> N >> K;
  vector<ll> H(N+1), X(N+1), Y(N+1);
  rep(i, N){
    cin >> H[i+1];
  }
  rep(i, N){
    cin >> X[i+1] >> Y[i+1];
  }
  vector<vector<ll>> F, G(N+1, vector<ll> (0));

  rep2(i, 1, N){
    rep2(k, i+1, N+1){
      double dis = sqrt(pow(X[i]-X[k], 2) + pow(Y[i]-Y[k], 2));
      if(dis <= K){
        if(H[i] < H[k]){
          G[i].push_back(k);
        } else if(H[i] > H[k]){
          G[k].push_back(i);
        }
      }
    }
  }

  ll ans = 0;
  rep2(i, 1, N+1){
    if(G[i].size() == 0){
      ans++;
    }
  }
  cout << ans;
}