import java.util.*;

public class Main{
	public static void main(String args[]){
     	Scanner sc = new Scanner(System.in);
      	int n = sc.nextInt();
      	long d = sc.nextLong();
        int count = 0;
        while(n-->0){
        	long a = sc.nextLong();
            long b = sc.nextLong();
            double ans = Math.sqrt(a*a + b*b);
            if(ans<=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