import java.util.*;

public class Main {
	public static void main(String[] args){
 
        Scanner sc = null;
        sc = new Scanner(System.in);
        int n = sc.nextInt();
        int d = sc.nextInt();
        double w_num = 0;
        long p = 0;
        long q = 0;
        double sqNum = 0;
        int ans = 0;
        for (int i = 0; i < n; i++) {
            p = sc.nextLong();
            q = sc.nextLong();
            w_num = (double)Math.pow(p, 2) + (double)Math.pow(q, 2);
            sqNum = (double)Math.sqrt(w_num);
            if (sqNum <= d){
                ans += 1;
            }
          }
          sc.close();
        System.out.println(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