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EIUMARKUP - Bills |
To encourage customers to buy more products, your store run discounts as the following:
- For first 100 products, each product costs 200 VND
- For the next 100 products, each product costs 199 VND
- For the next 100 products, each product cost 198 VND.
- ...
However, to make sure that the store will get some benefits, the price must be never lower than 180 for each product.
Input
The only line contains the number of product which a customer wants to buy (denoted by N, 0 <= N <= 105 )
Output
Output the amount of money the customer must pay.
Example
Input: 250 Output: 49800