import java.util.*;
public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    long N = sc.nextLong();
    long D = sc.nextLong();
    int counts = 0;
    for (int i = 0; i < N; i++) {
      long X = sc.nextLong();
      long Y = sc.nextLong();
      long A = X * X + Y * Y;
      if (A <= D * D) {
        counts++;
      }
    }
    System.out.println(counts);
  }
}

/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