import java.util.*;
import java.lang.*;

public class Main{
    public static void main(String[]args){
	Scanner sc = new Scanner(System.in);
    int N= sc.nextInt();
    long D=(long)Math.pow(sc.nextInt(),2);
    long d[]= new long[N];
    int ans =0;
    for(int i=0; i<N; i++){
        d[i]= (long)Math.pow(sc.nextInt(),2)+ (long)Math.pow(sc.nextInt(),2);
        if(D>=d[i]){
            ans++;
        }
    }
System.out.println(ans);
    }
}

/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