

import java.util.*;

public class Main {
	public static void main(String[] args) {
		Scanner in=new Scanner(System.in);
		int T=in.nextInt();
		int count=0;
		double a=Math.pow(in.nextDouble(),2);
		for(int i=0;i<T;i++) {
			double a1=in.nextDouble(),a2=in.nextDouble();
			if(Math.pow(a1,2)+Math.pow(a2,2)<=a) {
				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