import java.util.*;
import java.io.*;
import java.text.*;

public class NickyEnMark{
    public static void main(String[] args) throws IOException {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        double e = scanner.nextDouble();
        int ans = 0;
        for (int i = 0; i < n; i++) {
            double r = scanner.nextDouble();
            ans += Math.max(1, (int)Math.floor(Math.PI / Math.asin(0.5 * e / r) + 0.000001));
        }

        System.out.println(ans);
    }
}