04. Clever Lily

package S4_FoorLoops;

import java.util.Scanner;

public class CleverLily {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int years = Integer.parseInt(scanner.nextLine());
        double washingMachinePrice = Double.parseDouble(scanner.nextLine());
        int toyPrice = Integer.parseInt(scanner.nextLine());

        int toysCount = 0;
        int savedMoney = 0;
        int currentMoney = 10;

        for (int i = 1; i <= years; i++) {
            if (i % 2 == 0) {
                savedMoney += currentMoney;
                currentMoney += 10;
                savedMoney--;
            } else {
                toysCount += 1;
            }
        }

        int soldToysSum = toyPrice * toysCount;
        savedMoney += soldToysSum;

        double diff = Math.abs(washingMachinePrice - savedMoney);
        if(savedMoney >= washingMachinePrice) {
            System.out.printf("Yes! %.2f", diff);
        } else {
            System.out.printf("No! %.2f", diff);
        }
    }
}