import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n, d, x, y, num = 0;
        n = sc.nextInt();
        d = sc.nextInt();
        for (int i = 0; i < n; i++) {
            x = sc.nextInt();
            y = sc.nextInt();
            double dist = Math.sqrt(Math.pow(x, 2)+Math.pow(y, 2));
            if(dist <= d) ++num;
        }
        System.out.println(num);
        sc.close();
    }
}

/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