import java.util.*;
public class Main
{
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		double D = sc.nextDouble();
		int count=0;
		for(int i=0;i<N;i++){
		    double x = sc.nextDouble();
		    double y = sc.nextDouble();
		    if(D>=Math.sqrt(x*x +y*y)){
		        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