// package abc174;
import java.util.*;
import java.io.*;
public class Main {
  public static void main(String[] args){
   Scanner sc = new Scanner(System.in);
   int n = sc.nextInt();
   int d = sc.nextInt();
   int count = 0;
   for(int i=0;i<n;i++){
    long x = sc.nextLong();
    long y = sc.nextLong();
    if(Math.sqrt(x*x + y*y)<=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