package main

import . "fmt"
import . "math"

type J struct {
	h int
	x,y float64
	destroy bool
}

func (j *J)After(t *J)bool {
	return j.h>t.h
}

func (j *J)Dist(t *J)float64 {
	dx:=j.x-t.x
	dy:=j.y-t.y
	return Sqrt(dx*dx+dy*dy)
}

func main() {
	var n int
	var k float64
	Scan(&n,&k)
	js:=make([]*J,n)
	for i:=range js {
		j:=new(J)
		Scan(&j.h)
		js[i]=j
	}
	for _,j:=range js {
		Scan(&j.x,&j.y)
	}
	for _,j:=range js {
		for _,t:=range js {
			if j.After(t)&&j.Dist(t)<=k {
				t.destroy=true
			}
		}
	}
	c:=0
	for _,j:=range js {
		if !j.destroy {
			c++
		}
	}
	Println(c)
}