#include<bits/stdc++.h>
using namespace std;

#define debug(x) cerr << #x << " = " << (x) << endl
#define all(a) (a).begin(), (a).end()
#define rall(a) (a).rbegin(), (a).rend()
#define mp make_pair
#define pb push_back
typedef long long ll;
typedef long double ld;
typedef pair<int, int> Pii;
typedef pair<ll, ll> Pll;

struct IOSetup
{
	IOSetup()
	{
		cin.tie(nullptr)->sync_with_stdio(false);
		cout << fixed << setprecision(16);
		cerr << fixed << setprecision(16);
	}
} iosetup;

template <typename T1, typename T2>
ostream &operator <<(ostream &os, const pair<T1, T2> &p)
{
	os << p.first << " " << p.second;
	return os;
}

template <typename T1, typename T2>
istream &operator >>(istream &is, pair<T1, T2> &p)
{
	is >> p.first >> p.second;
	return is;
}

template <typename T>
ostream &operator <<(ostream &os, const vector<T> &v)
{
	for(int i = 0; i < (int) v.size(); i++) os << v[i] << (i+1 == (int) v.size() ? "" : " ");
	return os;
}

template <typename T>
istream &operator >>(istream &is, vector<T> &v)
{
	for(int i = 0; i < (int) v.size(); i++) is >> v[i];
	return is;
}

template <typename T> bool chmax(T &a, const T &b) { if(a < b) { a = b; return true; } return false; }
template <typename T> bool chmin(T &a, const T &b) { if(a > b) { a = b; return true; } return false; }

////////////////////////////////////////////////////////

int main()
{
	int N, K; cin >> N >> K;
	vector<int> H(N); cin >> H;
	vector<int> X(N), Y(N);
	for(int i = 0; i < N; i++) cin >> X[i] >> Y[i];
	vector<bool> need(N, true);
	for(int i = 0; i < N; i++)for(int j = 0; j < N; j++)if(i != 0)
	{
		ld dist = hypot(X[i]-X[j], Y[i]-Y[j]);
		if(dist <= K)
		{
			if(H[i] < H[j]) need[i] = false;
			if(H[j] < H[i]) need[j] = false;
		}
	}
	int ans = accumulate(all(need), 0);
	cout << ans << endl;
	return 0;
}