petfood

import math
days_off = int(input())
food = int(input())
dog_food = float(input())
cat_food = float(input())
turtle_food = float(input())

dog_eats = days_off * dog_food
cat_eats = days_off * cat_food
turtle_eats = (days_off * turtle_food) / 1000
total_eated = dog_eats + cat_eats + turtle_eats
diff = abs(food - total_eated)

if food >= total_eated:
    print(f"{math.floor(diff)} kilos of food left.")
else:
    print(f"{math.ceil(diff)} more kilos of food are needed.")