import java.util.*;
import java.io.*;

public class Main {

	public static void main(String[] args) throws NumberFormatException, IOException {
//		Scanner scan= new Scanner(System.in);
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		
		StringTokenizer st = new StringTokenizer(br.readLine());
		int N = Integer.parseInt(st.nextToken());
		int D = Integer.parseInt(st.nextToken());
		
//		int[] x = new int[N];
//		int[] y = new int[N];
		int count = 0;
		for (int i = 0; i < N; i++) {
			st = new StringTokenizer(br.readLine());
			int x = Integer.parseInt(st.nextToken());
			int y = Integer.parseInt(st.nextToken());
			
			if (Math.sqrt(Math.pow(x,2) + Math.pow(y,2)) <= 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