import java.util.ArrayList;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO 自動生成されたメソッド・スタブ
		Scanner sc = new Scanner (System.in);
		
		int n = sc.nextInt();
		long d = sc.nextInt();
		int cnt=0;
		boolean flgSame = false;
		
		ArrayList<Integer> arrX = new ArrayList<>();
		ArrayList<Integer> arrY = new ArrayList<>();
		
		for(int i=0;i<n;i++) {
			long x = sc.nextInt();
			long y = sc.nextInt();
			if(d*d >=x*x + y*y) {
				cnt++;
			}
		}
		System.out.println(cnt);
	}
}
/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