import java.util.*;
public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		while(sc.hasNext()){
			int N = sc.nextInt();
			long D = sc.nextLong();
			int count = 0;
			for(int i = 0; i< N; i++){
				long x = sc.nextLong();
				long y = sc.nextLong();
				if(x*x + y*y <= 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