import java.util.Scanner;

public class Main {
	public static void main(String[] args) {

		Scanner scan = new Scanner(System.in);
		int n = scan.nextInt();
		int d = scan.nextInt();
		int count = 0;
		long[][] arr = new long[n][2];
		for(int i=0;i<n;i++) {
			arr[i][0] = scan.nextLong();
			arr[i][1] = scan.nextLong();
		}
		scan.close();

		for(int i=0;i<n;i++) {
			if(Math.sqrt((arr[i][0])*(arr[i][0])+(arr[i][1])*(arr[i][1])) <= d) {
				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