import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		int count = 0;

		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();

		long d = sc.nextLong();
		long dd = d * d;

		sc.nextLine();
		for(int i=0;i<n;i++){
			long p = sc.nextLong();
			long q = sc.nextLong();
			long dist = p*p+q*q;
			if(dist <= dd){
				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