import java.io.*;
import java.util.*;
import java.util.function.*;
import java.util.stream.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        int k = sc.nextInt();
        House[] houses = new House[n];
        for (int i = 0; i < n; i++) {
            houses[i] = new House(sc.nextInt());
        }
        for (int i = 0; i < n; i++) {
            houses[i].point = new Point(sc.nextInt(), sc.nextInt());
        }
        Arrays.sort(houses);
        long d2 = (long)k * k;
        int ans = 0;
        for (int i = 0; i < n; i++) {
            boolean enable = false;
            for (int j = i + 1; j < n && !enable; j++) {
                enable = houses[i].histry < houses[j].histry && houses[i].getDistance2(houses[j]) <= d2;
            }
            if (!enable) {
                ans++;
            }
        }
        System.out.println(ans);
    }
    
    static class House implements Comparable<House> {
        int histry;
        Point point;
        
        public House(int histry) {
            this.histry = histry;
        }
        
        public long getDistance2(House h) {
            return point.getDistance2(h.point);
        }
        
        public int compareTo(House another) {
            return histry - another.histry;
        }
    }
    
    static class Point {
        long x;
        long y;
        
        public Point(long x, long y) {
            this.x = x;
            this.y = y;
        }
        
        public long getDistance2(Point p) {
            return (x - p.x) * (x - p.x) + (y - p.y) * (y - p.y);
        }
    }
}

class Scanner {
    BufferedReader br;
    StringTokenizer st = new StringTokenizer("");

    public Scanner() {
        try {
            br = new BufferedReader(new InputStreamReader(System.in));
        } catch (Exception e) {
            
        }
    }
    
    public int nextInt() {
        return Integer.parseInt(next());
    }
    
    public long nextLong() {
        return Long.parseLong(next());
    }
    
    public double nextDouble() {
        return Double.parseDouble(next());
    }
    
    public String next() {
        try {
            while (!st.hasMoreTokens()) {
                st = new StringTokenizer(br.readLine());
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            return st.nextToken();
        }
    }
    
}