import java.util.*;
import java.lang.*;
import java.io.*;

class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		Scanner in = new Scanner (System.in);
		int n = in.nextInt();
		int k = 0;
		while(n > 0) {
			k += n%3 + 1;
			n /= 3;
		}
		System.out.print(k - 2);
	}
}