import java.util.*;

public class Main{
    public static void main(String[] args) {
        int count = 0;
        Scanner sc = new Scanner(System.in);
        int n = Integer.parseInt(sc.next());
        int d = Integer.parseInt(sc.next());
        int x, y;
        for(int i = 0;i<n;i++){
            x = Integer.parseInt(sc.next());
            y = Integer.parseInt(sc.next());
            if(d >= Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2))) 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