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();
        int[] Xz = new int[N];
        int[] Yz = new int[N];
        for (int i = 0; i < N; i++){
            Xz[i] = sc.nextInt();
            Yz[i] = sc.nextInt();
        }
        double ans = 0;
        int cnt = 0;
        for (int i = 0; i < N; i++){
            ans = Math.sqrt(Math.pow(Xz[i], 2) + Math.pow(Yz[i], 2));
            if (ans <= D){
                cnt++;
            }
        }
        System.out.println(cnt);

    }
}
/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