import java.io.*;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        String[] data = in.readLine().split(" ");
        int n = Integer.parseInt(data[0]);
        long d = Integer.parseInt(data[1]);
        long dd = d * d;
        int ans = 0;
        for (int i = 0; i < n; i++) {
            data = in.readLine().split(" ");
            long x = Integer.parseInt(data[0]);
            long y = Integer.parseInt(data[1]);
            if (x*x + y*y <= dd) {
                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