import java.util.*;

class Main {
  public static void main(String[] args){
    Scanner sc = new Scanner(System.in);
    int n = sc.nextInt();
    long d = sc.nextInt();
    long[] x = new long[n];
    long[] y = new long[n];
    int cnt = 0;
    d *= d;
    
    for (int i=0; i<n; i++) {
      x[i] = sc.nextLong();
      x[i] *= x[i];
      y[i] = sc.nextLong();
      y[i] *= y[i];
      if (x[i]+y[i] <= d)
        cnt++;
    }
    
    System.out.println(cnt);
  }
}
/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