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 \leq N \leq 10^5~)

Output

• Output the amount of money the customer must pay.

Example Input

250

Example Output

49800