import java.io.*;

public class Main {
    public static void main(String[] args) throws Exception {
        try{
            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
            
            String strSplit[] = br.readLine().split(" ");
            int N = Integer.parseInt(strSplit[0]);
            int D = Integer.parseInt(strSplit[1]);
            
            int ans = 0;
            for(int i=0; i<N; i++){
                String pqSplit[] = br.readLine().split(" ");
                long p = Integer.parseInt(pqSplit[0]);
                long q = Integer.parseInt(pqSplit[1]);
                
                double pq = Math.sqrt(p*p + q*q);
                
                if(pq <= D){
                    ans++;
                }
            }
            
            System.out.println(ans);
            
        }catch(Exception e){
            System.out.println(e);
        }
    }
}
/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