import java.util.*;
public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner scn=new Scanner(System.in);
		int n=scn.nextInt();
		int d=scn.nextInt();
		int count=0;
		for(int q=1;q<=n;q++) {
			
			int x=scn.nextInt();
			int y=scn.nextInt();
			double dis=Math.sqrt((Math.pow(x, 2)+Math.pow(y, 2)));
			if(dis<=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