Exam 24-Apr-2016 - 04. Smart Lilly

/**
 * Project: Exam_24_April_2016 - created by borkins on 2017-05-15.
 */

import java.util.Scanner;

public class _04_SmartLilly
{
    public static void main(String[] args)
    {
        Scanner console = new Scanner(System.in);

        int age = Integer.parseInt(console.nextLine());
        double priceWM = Double.parseDouble(console.nextLine());
        int priceToy = Integer.parseInt(console.nextLine());

        int toys = 0;
        double moneys = 0.0;

        for (int i = 1; i <= age; i++)
        {
            if (i % 2 == 0) {
                moneys += (i * 5) - 1;
            }
            else {
                toys++;
            }
        }

        moneys += (toys * priceToy);

        if (moneys >= priceWM) {
            System.out.printf("Yes! %.2f%n", (moneys - priceWM));
        }
        else {
            System.out.printf("No! %.2f%n", (priceWM - moneys));
        }
    }
}