import java.util.*;
public class Main{
  public static void main(String[] args){
    Scanner sc=new Scanner(System.in);
    int n=sc.nextInt(),d=sc.nextInt(),f=0;
    for(int i=0;i<n;i++){
      long x=sc.nextInt(),y=sc.nextInt();
        if(d>=Math.sqrt(x*x+y*y)) f++;
    }
    System.out.println(f);
  }
}
/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