import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

class Main{
  public static void main(String[] args) throws IOException {
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt(), res =0;
    double d = sc.nextDouble();
    for(int i=0; i<n; i++){
      double p = sc.nextInt(), q = sc.nextInt();
      res += Math.sqrt(p*p + q*q) <= d ? 1 : 0;
    }
    System.out.println(res);
  }

  static class Scanner {
    StringTokenizer st;
    BufferedReader br;

    public Scanner(InputStream s) {
      br = new BufferedReader(new InputStreamReader(s));
    }

    public Scanner(FileReader s) throws FileNotFoundException {
      br = new BufferedReader(s);
    }

    public String next() throws IOException {
      while (st == null || !st.hasMoreTokens())
        st = new StringTokenizer(br.readLine());
      return st.nextToken();
    }

    public int nextInt() throws IOException {
      return Integer.parseInt(next());
    }

    public long nextLong() throws IOException {
      return Long.parseLong(next());
    }

    public String nextLine() throws IOException {
      return br.readLine();
    }

    public double nextDouble() throws IOException {
      return Double.parseDouble(next());
    }

    public boolean ready() throws IOException {
      return br.ready();
    }
  }
}
/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