@MartinBG

Съжалявам, моя грешка, ето я пълната задачка: Все пак мисля, че се изискват няколко входа, но още не съм сигурен.

## "Exercise" Requirements

- Create a basic Groceries Shop till which can `scan` fruits and vegetables of different types, producing a numeric result/bill in the end. Assume the currency is called `aws` and there is `100 cloud ('c' for short)` in 1 aws
- Apart from simply adding the value of each product, the till should contain logic for the following special deals:
  - `2 for 3` - for a given selection of items (customer buys 3 items but only pays for the value of 2 of them, the cheapest one is free). In case there are more than 3 items that are included in the `2 for 3` deal, the first 3 items are included.
    Example Deal ["banana", "orange", "tomato"], example items scanned ["banana", "orange", "orange", "tomato"] - the tomato is not included in the discount (the cheaper of `banana` or `orange` will be subtracted)
  - `buy 1 get 1 half price` - for a given selection of items (if the customer buys a given product under such offer, they receive a 50% reduction in the price of a second item of the same type)
- The till should be `programmable` so that whoever runs it can define 2 inputs:
  - The list of items supported by the till - each item with a given "price", "name"
  - Once a new item is added to the till, the administrator should be able to add it to any of the 2 special deals defined above
  - You should be able to scan a list of items and see the end price (any special deal discounts should be subtracted)

### Example:

Input groceries:

| Product | Price |
| ------- | :---: |
| apple   |  50c  |
| banana  |  40c  |
| tomato  |  30c  |
| potato  |  26c  |

Input deals:

- `2 for 3` - ["apple", "banana", "tomato"]
- `buy 1 get 1 half price` - potato

Example scanned customer basket: "apple", "banana", "banana", "potato", "tomato", "banana", "potato"

Expected Output: `1 aws and 99 clouds`
Explanation:

The items are processed(Scanned) in order:

- "apple", "banana", "banana" are picked up for the `2 for 3` deal and 1 of the bananas is free - total cost `90c`

- "potato", "tomato", "banana", "potato" are left. There is a `buy 1 get 1 half price` for potatoes, meaning the second potato will be half price (13c) so it will be `39c` for both

- The other 2 items scanned `tomato` and `banana` are not part of any deals so they are charged their basic price `70c` total

The total amount the is equal to: `90c + 39c + 70c = 1 aws and 99 clouds` (199 clouds = 1.99 aws)