import java.util.Scanner;

public class Main{
 public static void main(String[] args) {
   Scanner kbd =new Scanner(System.in);
   int n=kbd.nextInt();
   int d=kbd.nextInt();
   int num=0;
   for(int i=0;i<n;i++){
   long x=kbd.nextInt();
   long y=kbd.nextInt();
   if(Math.sqrt(x*x+y*y)<=d){
   num++;
 }
}
 System.out.println(num);
}
}

/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz