import java.util.Scanner;
import java.util.ArrayList;
import java.util.List;

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