9.2.1. Passion days https://python-book.softuni.bg/cha

enter_sum = float(input())
all_shopping_sum = 0
all_shopping_pieces = 0
price_of_item = 0
command = input()

while command != 'mall.Enter':
    command = input()
command = input()
while command != 'mall.Exit':
    all_shopping_pieces += 1
    for i in range(len(command)):
        b = ord(command[i])
        if 65 <= b <= 90:
            price_of_item = b * 0.5
        elif 97 <= b <= 122:
            price_of_item = 0.3 * b
        elif command[i] == '%':
            price_of_item = 0.5 * (enter_sum - all_shopping_sum)
        elif command[i] == '*':
            price_of_item = -10
        all_shopping_sum += price_of_item
        if all_shopping_sum > enter_sum:
            all_shopping_sum -= price_of_item
            all_shopping_pieces -= 1
        price_of_item = 0
        i += 1
    command = input()
if all_shopping_pieces <= 0:
    print(f'No purchases. Money left: {(enter_sum-all_shopping_sum):.2f} lv.')
else:
    print(f'{all_shopping_pieces} purchases. Money left: {(enter_sum-all_shopping_sum):.2f} lv.')