import java.util.Scanner;

class Main{
    public static void main(String args[]){
        Scanner sc = new Scanner(System.in);
        long n = sc.nextLong();
        long d = sc.nextLong();
        long x = 0;
        long y = 0;

        long count = 0;

        for(long i = 0; i < n; i++){
            x = sc.nextLong();
            y = sc.nextLong();
            if((x * x) + (y * y) <= d * d){
                count++;
            }
        }
        sc.close();

        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