Clever Lili

import java.util.Scanner;

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

        int liliAge = Integer.parseInt(scanner.nextLine());
        double washerPrice = Double.parseDouble(scanner.nextLine());
        int toyPrice = Integer.parseInt(scanner.nextLine());
        int savedMoneyFromBd = 0;
        int toyNum = 0;
        int savedMoneyFromToys = 0;
        double totalSavedMoney = 0;
        int m = 1;

        for (int i = 1; i <= liliAge; i++) {

            if (i % 2 == 0) {
                savedMoneyFromBd = savedMoneyFromBd + m * 10;
                m++;
            } else {
                toyNum++;
                savedMoneyFromToys = toyNum * toyPrice;
            }
            totalSavedMoney = savedMoneyFromToys + savedMoneyFromBd - (m-1);
        }

        if (totalSavedMoney > washerPrice) {
            System.out.printf("Yes! %.2f", totalSavedMoney - washerPrice);
        } else {
            System.out.printf("No! %.2f", washerPrice - totalSavedMoney);
        }
    }
}