Takahashi loves gold coins. He gains 1000 happiness points for each 500-yen coin he has and gains 5 happiness points for each 5-yen coin he has. (Yen is the currency of Japan.)

Takahashi has X yen. If he exchanges his money so that he will gain the most happiness points, how many happiness points will he earn?

(We assume that there are six kinds of coins available: 500-yen, 100-yen, 50-yen, 10-yen, 5-yen, and 1-yen coins.)

Constraints

* 0 \leq X \leq 10^9
* X is an integer.

Input

Input is given from Standard Input in the following format:


X


Output

Print the maximum number of happiness points that can be earned.

Examples

Input

1024


Output

2020


Input

0


Output

0


Input

1000000000


Output

2000000000
import java.util.*;
public class Main{
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int a = in.nextInt();
        long x = (a/500)*1000;
        x+=((a%500)/5)*5;
        System.out.println(x);
    }
}