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 ans = 0;
    for(int i=0;i<N;i++){
      int p = sc.nextInt();
      int q = sc.nextInt();
      double dist = Math.sqrt(Math.pow(p,2)+Math.pow(q,2));
      if(dist<=D) ans++;
    }
    
    System.out.print(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