import java.util.Scanner;
public class Main
{
  public static void main (String[] args)
  {
    Scanner sc = new Scanner(System.in);
    int p = sc.nextInt();
    int q = sc.nextInt();
    int result = 0;
    
    for(int i = 0; i < p; i++)
    {
      double x1 = sc.nextDouble();
      double x2 = sc.nextDouble();
      double dis = Math.sqrt(Math.pow(x1,2) + Math.pow(x2,2));
    if(dis <= q)
      result++;
    }
    System.out.println(result);
  }
}

/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