import java.util.Scanner;

public class Main {
    public static void main(String[] args) {


        Scanner sc = new Scanner(System.in);
        int n = Integer.parseInt(sc.next());
        int d = Integer.parseInt(sc.next());

        int count = 0;

        for (int i = 0; i < n; i++) {
            double x1 = Double.parseDouble(sc.next());
            double x2 = Double.parseDouble(sc.next());

            if (Math.sqrt(x1 * x1 + x2 * x2) <= 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