import java.util.*;
 
class Main{
  public static void main(String args[]){
    Scanner scan=new Scanner(System.in);
    int num=scan.nextInt();
    int disall=scan.nextInt();
    int x,y;
    int ans=0;
    for(int a=0; a<num; a++){
      x=scan.nextInt();
      y=scan.nextInt();
      if(Math.sqrt((long)x*(long)x+(long)y*(long)y)<=disall){
        ans++;
      }
    }
    System.out.println(ans);
  }
}
/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