import java.util.Scanner;

public class Main{
  public static void main(String args[]){
    Scanner sc = new Scanner(System.in);
     
    int n = sc.nextInt();
    int d = sc.nextInt();
    int m=0;
    int i=0;
    while(i < n){ 
      long a = sc.nextLong();
      long b = sc.nextLong();
      i++;
      if(Math.sqrt(a*a + b*b)<=d) m++;
   
    }
    
    System.out.println(m);
  }
}
/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