import java.io.*;
import java.util.*;

class Main{
 
  public static void main(String args[]){
    
    Scanner s= new Scanner(System.in);
    
    int n =s.nextInt();
    float d = s.nextInt();
    int count=0;
    
    for(int i=0;i<n;i++){
     if(Math.sqrt(Math.pow(s.nextInt(),2)+Math.pow(s.nextInt(),2))<=d)
       count++;
    }
    System.out.println(count);
    
  }
  
}
/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