#include <bits/stdc++.h>
#include <boost/multiprecision/cpp_int.hpp>
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define all(x) (x).begin(), (x).end()
typedef long long ll;
using namespace std;
using namespace boost::multiprecision;

int main(void)
{
	int N; cin >> N;
	cpp_int K; cin >> K;
	vector<int> H(N); rep(i, N) cin >> H[i];
	vector<cpp_int> X(N), Y(N);
	rep(i, N) cin >> X[i] >> Y[i];
	vector<bool> deleted(N, false);

	rep(i, N) rep(j, N)
	{
		if (deleted[i]) continue;
		if (pow(X[i] - X[j], 2) + pow(Y[i] - Y[j], 2) <= K * K && H[i] < H[j])
		{
			deleted[i] = true;
		}
	}

	ll ans = 0;
	rep(i, N) if (!deleted[i]) ans++;

	cout << ans << endl;

	return 0;
}