import java.util.*;

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++)
        {
          int a = sc.nextInt();
          int b = sc.nextInt();
     double c = Math.sqrt(Math.pow(a, 2) + Math.pow(b, 2));
          if(c<=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