import java.util.*;
public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		long d = sc.nextLong();
		int count =0;
		for (int i =0;i<n;i++) {
			long x = sc.nextLong();
			long y =sc.nextLong();
			double power = (Math.sqrt(Math.pow(x, 2) +Math.pow(y, 2)));
			if(x*x+y*y<=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