#Уровень: Хуйня...
#Задание 1
def my_round(number, characters_number):
    number = number * (10 ** characters_number) + 0.41
    number //= 1
    return number / (10 ** characters_number)
number, characters_number = float(input()), int(input())
print(my_round(number, characters_number))