import java.util.Scanner;
import java.time.Year;
import java.util.Random;
import java.math.*;

public class Main{
    public static void main(String[] args){
        Scanner sc =new Scanner(System.in);
        long n = sc.nextInt();
        long d = sc.nextInt();
        long x = 0;
        long y = 0;
        long d2=d*d;
        long a = 0;
        int bigger = 0;
        int smaller = 0;
        while(true){
            x = sc.nextInt();
            y = sc.nextInt();
            a=(Math.abs(x)*Math.abs(x) + Math.abs(y)*Math.abs(y)); 
            if(a > d2){
                bigger++;
            }else{
                smaller++;
            }
            if(bigger+smaller >= n){
                System.out.println(smaller);
                break;
            }
        }
    }
}
     
/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