import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int N = sc.nextInt();
		int D = sc.nextInt();
		int X,Y,kosu;
		double keisan;
		
		X=0;
		Y=0;
		keisan=0;
		kosu=0;
		
		for(int i=1;i<=N;i++) {
			X = sc.nextInt();
			Y = sc.nextInt();
			
			keisan = Math.sqrt(Math.pow(X,2)+Math.pow(Y,2));
			
			if(keisan<=D) {
				kosu++;
			}
		}
		
		System.out.println(kosu);
		sc.close();
	}

}
/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