import java.util.Scanner;
import java.lang.Math;

public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

        int N = scan.nextInt(); long D = scan.nextInt();

        int ans = 0;
        for(int i = 0; i < N; i++) {
            long X = scan.nextInt();
            long Y = scan.nextInt();
            if(X*X+Y*Y <= D*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