import java.util.Scanner;

public class Main{
	public static void main(String args[]){
      Scanner scan = new Scanner(System.in);
      long N = scan.nextInt();
      long D = scan.nextInt();

      int ans = 0;
      for(int i = 0;i < N;i++){
        long x = scan.nextInt();
        long y = scan.nextInt();
        if((x * x + y * y) <= D * 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