import java.util.Scanner;

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

        int NumberOfDays = Integer.parseInt(scanner.nextLine());
        int LeftFood = Integer.parseInt(scanner.nextLine());
        double FoodForDogkg = Double.parseDouble(scanner.nextLine());
        double FoodForCatkg = Double.parseDouble(scanner.nextLine());
        double FoodForTurtleGr = Double.parseDouble(scanner.nextLine());

        double neededfoodfordog = NumberOfDays * FoodForDogkg;
        double neededfoodforcat = NumberOfDays * FoodForCatkg;
        double neededfoodforturtle = NumberOfDays * (FoodForTurtleGr / 1000);
        double Totalamountoffood = neededfoodfordog + neededfoodforcat + neededfoodforturtle;

        if (LeftFood > Totalamountoffood)
        { double RemainFood = LeftFood - Totalamountoffood;
            System.out.printf( "%.0f kilos of food left" , Math.floor(RemainFood)); }
        else
        {double NeededFood = Totalamountoffood - LeftFood;
            System.out.printf( "%.0f more kilos of food are needed." , Math.ceil(NeededFood)) ;}

        }
}