import java.util.HashMap;
import java.util.Scanner;
import java.util.stream.IntStream;
import java.lang.Math;

public class Main {
    public static void main(String args[]){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int d = sc.nextInt();

        int ans = 0;
        for(int i = 0; i < n; i++){
            double key = sc.nextDouble();
            double value = sc.nextDouble();
            double r = Math.pow(key, 2) + Math.pow(value, 2);
            double a = Math.sqrt(r);
            if(a <= d){
                ans++;
            }
        }
        System.out.println(ans);
    }
}
/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