import java.util.Scanner;

public class TouristShop {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        double budget = Double.parseDouble(scanner.nextLine());
        int counter = 0;
        int productCount = 0;
        boolean isDone = false;
        double sum = 0;


        String command = scanner.nextLine();
        while (!"Stop".equals(command)) {
            counter++;
            String productName = command;
            double priceProduct = Double.parseDouble(scanner.nextLine());
            productCount++;

            if (counter == 3) {
                priceProduct /= 2;
                counter = 0;
            }
            sum += priceProduct;
            budget -= priceProduct;
            if (budget < priceProduct) {
                isDone = true;
                break;
            }

            command = scanner.nextLine();
        }
        if (isDone) {
            System.out.println("You don't have enough money!");
            System.out.printf("You need %.2f leva!", Math.abs(budget));
        } else {
            System.out.printf("You bought %d products for %.2f leva.", productCount, sum);
        }
    }
}