import java.util.*;

public class Main{
  public static void main(String[] args){
    Scanner sc=new Scanner(System.in);
    long N=sc.nextLong(), D=sc.nextLong(), t=0, a,b,d;
    D*=D;
    for(int i=0; i<N; i++){
      a=sc.nextLong();
      b=sc.nextLong();
      d = a*a +b*b;
      if(d<=D) t++;
    }
    System.out.println(t);
  }
}
/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