import java.util.Scanner;class Main{public static void main(String[] a){Scanner s=new Scanner(System.in);int n=s.nextInt();int d=s.nextInt();int k=0;for(;n>0;n--){if(Math.sqrt(Math.pow(s.nextInt(),2)+Math.pow(s.nextInt(),2))<=d)k++;}System.out.print(k);}}
/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