import java.io.*;
class Main{
  public static void main(String[] args) throws IOException{
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    String s[] = br.readLine().trim().split(" ");
    double n = Double.parseDouble(s[0]);
    double d = Double.parseDouble(s[1]);
    int count =  0;
    while(n-- >0){
      s = br.readLine().trim().split(" ");
      double x1 = Double.parseDouble(s[0]);
      double x2 = Double.parseDouble(s[1]);
      double r = (x1*x1) + (x2*x2);
      r = Math.sqrt(r);
      if(r <= d)
        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