import java.util.*;

public class Main {

    public static void main (String[] args) {
        Scanner sc = new Scanner(System.in);
        long n = sc.nextLong(), d = sc.nextLong(), count  = 0;
        while (n-->0){
            long a = sc.nextLong(), b = sc.nextLong();
            if(((a*a)+(b*b)) <= (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