import java.util.Scanner;

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

      int x= Integer.parseInt(sc.nextLine());
      double y= Double.parseDouble(sc.nextLine());
      int z= Integer.parseInt(sc.nextLine());

      double grape= x*y;
      double grapeForWine= (grape/2.5) * 0.4;
           if (grapeForWine >=z){
          System.out.printf("Good harvest this year! Total wine:%.0f liters.%n", Math.floor(grapeForWine));
          double left= grapeForWine- z;
          double winePerWorker= left/workers;
          System.out.printf("%.0f liters left-> %.0f liters per person." Math.ceil (left), Math.ceil (WinePerWorker));
          }else{
              double neededWine=z-grapeforWine;
          System.out.printf("It will be a tough winter! More %.0f liters wine needed.", Math.floor(neededWine));
      }

    }
}