import java.util.*;
class Main{
public static void main(String[]args){
Scanner sc=new Scanner(System.in);
  int n=sc.nextInt();
  int d=sc.nextInt();
  double dd=Math.pow(d,2);
  int count=0;
  for(int i=0;i<n;i++){
    double a=Math.pow(sc.nextInt(),2)+Math.pow(sc.nextInt(),2);
    if(a<=dd){
      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