import java.util.*;
public class Main {
    public static void main(String args[]) {
      Scanner in = new Scanner(System.in);
      int n = in.nextInt(); long d = in.nextLong();
      int count = 0;
      while(n > 0){
          n--;
          long x = in.nextLong();
          long y = in.nextLong();
          if(x*x + y*y <= d*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