import java.util.Scanner;

public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        Double D = sc.nextDouble();
        Double[][] X = new Double[N][2];

        for(int i=0; i<N*2; i++){
            if(i%2 == 0){
                X[i/2][0] = sc.nextDouble();
            }else{
                X[i/2][1] = sc.nextDouble();
            }
        }
        sc.close();
        int ans = 0;
        for(int i=0; i<N; i++){
            if(Math.sqrt(X[i][0]*X[i][0]+(X[i][1]*X[i][1])) <= D){
                ans ++;
            }
        }
        System.out.println(ans);
    }
}
/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