#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
#define rep(i, n) for(int i=0;i<(n);++i)
#define rep1(i, n) for(int i=1;i<=(n);i++)
#define ll long long
using mint = modint998244353;
using P = pair<ll,ll>;
using lb = long double;
using T = tuple<ll, ll, ll>;
#ifdef LOCAL
#  include <debug_print.hpp>
#  define dbg(...) debug_print::multi_print(#__VA_ARGS__, __VA_ARGS__)
#else
#  define dbg(...) (static_cast<void>(0))
#endif

int main()
{
    ll n, k;
    cin >> n >> k;
    vector<int> h(n);
    rep(i,n) cin >> h[i];
    vector<int> x(n), y(n);
    rep(i,n) cin >> x[i] >> y[i];
    dsu uf(n);
    vector<vector<int>> g(n);
    auto dist = [&](int i, int j) -> ll {
        return (x[i]-x[j])*(x[i]-x[j]) + (y[i]-y[j])*(y[i]-y[j]);
    };
    vector<int> d(n);
    int ans = 0;
    rep(i,n)rep(j,n) {
        if(dist(i,j)<=k*k && h[i]<h[j]) {
            g[i].push_back(j);
        }
    }
    rep(i,n) if(g[i].size()>0) ans++;
    cout << n-ans << endl;
   
    return 0;
}