import java.util.*;
import java.io.*;
public class Main extends PrintWriter {
    Main()
    {
        super(System.out);
    }
    public static void main(String args[]) {
      Main o=new Main();
      o.main();
      o.flush();
      o.close();
    }
    void main()
    {
        Scanner sc=new Scanner(System.in);
        int n=sc.nextInt();
        int d=sc.nextInt();
        int c=0;
        while(n-->0)
        {
            int x=sc.nextInt();
            int y=sc.nextInt();
            double sp=Math.sqrt(Math.pow(x,2)+Math.pow(y,2));
            if(sp<=d)
            c++;
        }
        println(c);
        
    }
}
/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