#include <iostream>
#include <vector>

using namespace std;
typedef long long ll;
ll h[2010],x[2010],y[2010];
ll calcDis(int i,int j){
    return (x[i] - x[j])*(x[i] - x[j]) + (y[i] - y[j])*(y[i] - y[j]);
}
int main(){
    ll i,j,n,k; cin >> n >> k;
    for(i=0;i<n;i++) cin >> h[i];
    for(i=0;i<n;i++) cin >> x[i] >> y[i];
    int ans = n;
    for(i=0;i<n;i++){
        for(j=0;j<n;j++){
            if(h[i]>=h[j]) continue;
            if(calcDis(i,j)<=k*k){
                ans--;
                break;
            }
        }
    } 
    cout << ans << "\n";
}