Problems
Compact discs
Compact discs
Blank compact discs are on sale in packages of three kinds. A package with 100 disсs costs 100 UAH, one with 20 discs costs 30 UAH, and one disс costs 2 UAH. What minimal sum of money should you pay to buy n such disсs?
Input data
The natural number n (n ≤ 1000).
Output data
Print the minimal sum to buy n disсs.
.
Examples
Input example #1
123
Output example #1
136