using System;

public class Hello
{
    static void Main()
    {
        string[] line = Console.ReadLine().Trim().Split(' ');
        var n = int.Parse(line[0]);
        var k = long.Parse(line[1]);
        line = Console.ReadLine().Trim().Split(' ');
        var h = Array.ConvertAll(line, long.Parse);
        getAns(n, k, h);
    }
    static void getAns(int n, long k, long[] h)
    {
        var a = new (long x, long y)[n];
        k *= k;
        for (int i = 0; i < n; i++)
        {
            string[] line = Console.ReadLine().Trim().Split(' ');
            var x = long.Parse(line[0]);
            var y = long.Parse(line[1]);
            a[i] = (x, y);
        }
        var c = 0;
        for (int i = 0; i < n; i++)
        {
            for (int j = 0; j < n; j++)
            {
                if (i == j) continue;
                if (h[i] < h[j])
                {
                    var wd = (a[i].x - a[j].x) * (a[i].x - a[j].x) + (a[i].y - a[j].y) * (a[i].y - a[j].y);
                    if (wd <= k) { c++; break; }
                }
            }
        }
        Console.WriteLine(n - c);
    }
}