import java.util.Scanner;

public class Test {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        double IvanMoney = Double.parseDouble(scanner.nextLine());
        int students = Integer.parseInt(scanner.nextLine());
        double lightsaberPrice = Double.parseDouble(scanner.nextLine());
        double robesPrice = Double.parseDouble(scanner.nextLine());
        double beltsPrice = Double.parseDouble(scanner.nextLine());
        int freeBelts = students /6;
        double sumMoney = lightsaberPrice*(Math.ceil(students * 1.1))+ robesPrice * students+ beltsPrice*(students-freeBelts);
        double totalMoney = IvanMoney - sumMoney;
        if (IvanMoney >= sumMoney){
            System.out.printf("The money is enough - it would cost %.2flv.",sumMoney);
        }else{
            System.out.printf("Ivan Cho will need %.2flv more.",Math.abs(totalMoney));
        }
    }
}