#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define REP(i, x, y) for (auto i = (x); i < (y); i++)
#define RREP(i, x, y) for (auto i = (y) - 1; (x) <= i; i--)
#define ALL(x) (x).begin(), (x).end()
#pragma GCC optimize("O3")
int main(){
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  ll N, K;
  cin >> N >> K;
  vector<int> H(N);
  REP(i, 0, N){
    cin >> H[i];
  }
  vector<ll> X(N), Y(N);
  REP(i, 0, N){
    cin >> X[i] >> Y[i];
  }
  vector<int> ans(N, 1);
  REP(i, 0, N){
    REP(j, 0, N){
      if(H[i] < H[j]){
        if((X[i] - X[j])*(X[i] - X[j]) + (Y[i] - Y[j])*(Y[i] - Y[j]) <= K*K){
          ans[i] = 0;
        }
      }
    }
  }
  cout << accumulate(ALL(ans), 0) << "\n";
  return 0;
}
/*
  File : ~/yukicoder/midoriika_3rd/E.cpp
  Date : 2024/10/12
  Time : 14:41:33
*/