#include<bits/stdc++.h>
using namespace std;
#define int long long
signed main() {
	int n,k;
	cin >> n >> k;
	vector<int> h(n),x(n),y(n);
	for(int i = 0; i < n; i++) cin >> h[i];
	for(int i = 0; i < n; i++) cin >> x[i] >> y[i];
	vector<tuple<int,int,int>> a(n);
	for(int i = 0; i < n; i++) a[i] = {h[i],x[i],y[i]};
	sort(a.begin(),a.end());
	for(int i = 0; i < n; i++) tie(h[i],x[i],y[i]) = a[i];
	vector<bool> r(n,true);
	int ans = 0;
	for(int i = 0; i < n-1; i++) {
		for(int j = i+1; j < n; j++) {
			if(h[i] < h[j] && (x[i]-x[j])*(x[i]-x[j])+(y[i]-y[j])*(y[i]-y[j]) <= k*k) {
				r[i] = false;
				break;
			}
		}
		if(r[i]) ans++;
	}
	ans++;
	cout << ans << endl;
}