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();
		long x = 0;
		long y = 0;
		int count = 0;
		double distance = 0;

		for (int i = 0; i < N; i++ ) {
			x = sc.nextLong();
			y = sc.nextLong();
			distance = Math.hypot(x, y);
			if (distance <= D) count++;
		}

		sc.close();

		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