import java.util.*;
public class Main {
 
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
 
		int N = sc.nextInt(), D = sc.nextInt(), c = 0;
 
		for(int i = 0; i < N; i++) {
			long X = sc.nextInt(), Y = sc.nextInt();
			if(Math.sqrt(X * X + Y * Y) <= D) {
				c++;
			}
		}
		System.out.println(c);
	}
}
/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