import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		 Scanner sc = new Scanner(System.in);
		  int n = sc.nextInt();
		  int d = sc.nextInt();
		  int ans = 0;
		  for(int i=0;i<n;i++) {
			  double a = sc.nextInt();
			  double b = sc.nextInt();
			  if(Math.sqrt(a*a+b*b)<=d) {
				  ans++;
			  }
		  }
		  System.out.println(ans);
	}

}
/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