#include <bits/stdc++.h>
#define rep(i,n) for(int i=0;i<(n);++i)
using namespace std;
using ll = long long;

int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    
    ll n,k;
    cin >> n >> k;
    vector<int> h(n);
    rep(i,n) cin >> h[i];
    vector<complex<double>> z(n);
    rep(i,n){
        int x,y;
        cin >> x >> y;
        z[i] = complex<double>(x,y);
    }
    vector<int> cnt(n,0);
    rep(i,n){
        rep(j,n){
            if(h[i]>h[j] && norm(z[i]-z[j])<=k*k){
                cnt[j]++;
            }
        }
    }

    int ans = 0;
    rep(i,n) if(cnt[i]==0) ans++;
    cout << ans << endl;

}