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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

The natural number n (n1000).

Output

Print the minimal sum to buy n disсs.

.

Time limit 1 second
Memory limit 128 MiB
Input example #1
123
Output example #1
136