import java.util.*;

class Main
{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        
        int n = sc.nextInt();
        int d = sc.nextInt();
        
        double[][] array = new double[n][2];
        int count = 0;
        for (int i = 0; i < array.length; i++) {
            array[i][0] = sc.nextDouble();
            array[i][1] = sc.nextDouble();
            
            double result = Math.sqrt(Math.pow(array[i][0], 2) + Math.pow(array[i][1], 2));
            if (result <= 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