import java.util.*;
public class Main {
    public static void main(String args[]) {
     Scanner s=new Scanner(System.in);
  int n=s.nextInt();
  double d=s.nextDouble();
  int c=0;
  for(int i=0;i<n;i++)
  {
      int x=s.nextInt();
      int y=s.nextInt();
      long x1=x*x;
      long y1=y*y;
     double d1 = Math.hypot(x, y);
    
      if(d1<=d)
      {
      c++;
    // System.out.print(x+" "+y+"\n");
      }
  }
  System.out.println(c);
    }
}
/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