JavaBook-ProblemsForChampions-PartII-PassionDays

import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.Scanner;

public class PassionDays2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        BigDecimal money = new BigDecimal(scanner.nextLine());
        String command = scanner.nextLine();

        int purchasesCount = 0;

        while (!command.equals("mall.Enter")) {
            command = scanner.nextLine();
        }
        command = scanner.nextLine();
        while (!command.equals("mall.Exit")) {
            for (char action : command.toCharArray()) {
                if (action == '*') {
                    money = money.add(new BigDecimal("10.00"));
                    continue;
                }
                BigDecimal price = new BigDecimal("0.00");
                if (Character.isUpperCase(action)) {
                    price = new BigDecimal(action).multiply(new BigDecimal("0.5"));
                } else if (Character.isLowerCase(action)) {
                    price = new BigDecimal(action).multiply(new BigDecimal("0.3"));
                } else if (action == '%') {
                    price = money.multiply(new BigDecimal("0.5"));
                } else {
                    price = new BigDecimal(action);
                }
                if (money.compareTo(price) < 0 || money.compareTo(new BigDecimal("0.00")) == 0) {
                    continue;
                }
                money = money.subtract(price);
                purchasesCount++;
            }
            command = scanner.nextLine();
        }
        if (purchasesCount == 0) {
            System.out.printf("No purchases. Money left: %s lv.%n",
                    money.setScale(2, RoundingMode.HALF_UP));
        } else {
            System.out.printf("%d purchases. Money left: %s lv.%n", purchasesCount,
                    money.setScale(2, RoundingMode.HALF_UP));
        }
    }
}