import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        double n = in.nextDouble();
        double d = in.nextDouble();
        int ans = 0;
        while(n-->0){
            double x = in.nextDouble();
            double y = in.nextDouble();
            if (Math.sqrt(x * x + y * y) <= d)
                ans++;
        }
        System.out.println(ans);
        in.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