# Amazon Online Assessment (OA) - Five Star Seller

An arborist that operates a plant store in Brooklyn, NY would like to improve their online sales by improving their ratings.

In order to become a five-star store, they must maintain a certain threshold percentage of five-star ratings. Given their current situation, find the minimum number of additional five-star ratings they must receive to meet the threshold. The overall online store percentage is calculated by taking the sum of percentages of five-star ratings for each product.

### Examples

#### Example 1:

##### Input:

`productCount`

= `3`

`productRatings`

= `[[4,4],[1,2],[3,6]]`

where each entry is `[five-star reviews, total reviews]`

`threshold`

= `77`

##### Output: `3`

##### Explanation :

We need the sum of the percentages of five-star ratings for each product to add up to the threshold.

The current percentage of five-star ratings for this seller is `((4/4) + (1/2) + (3/6))/3 = 66.66%`

If we add a five star review to product #2, their threshold becomes `((4/4) + (2/3) + (3/6))/3 = 72.22%`

If we add another five star review to product #2, their threshold becomes `((4/4) + (3/4) + (3/6))/3 = 75%`

If we add a five star review to product #3, their threshold becomes `((4/4) + (3/4) + (4/7))/3 = 77.38%`

At this point, the `77%`

threshold is met. The answer is `3`

, because there is no other way to add less ratings and achieve `77%`

or more.

### Constraints:

There is always at least one product, and the threshold is between `1`

and `99`

inclusive. All values are positive.