import java.util.*;

class Task2
{
	public static void main (String[] args)
	{
		int N;
		Scanner in = new Scanner(System.in);
		N = in.nextInt();
		if (N % 100 >= 65) 
			N = 100 * (N / 100 + 1);
		if (N % 20 > 15) 
			N = 20 * (N / 20 + 1);
		System.out.println((N / 100) * 100 + (N % 100 / 20) * 30 + 2 * (N % 20));
	}
}