import java.util.Scanner;

public class Main {
	public static void main(String args[]) {
		Scanner stdIn = new Scanner(System.in);
		int N = stdIn.nextInt();
		int D = stdIn.nextInt();
		double X;
		double Y;
		int count = 0;
		for(int i = 0; i < N; i ++) {
			X = stdIn.nextDouble();
			Y = stdIn.nextDouble();
			if(Math.sqrt(X * X + Y * Y) <= 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