#include <iostream>
using namespace std;

int main()
{
    int b = 0;
    cin >> b;
    int c = 0;
    while (b!=1)
    {
        if ((b + 1) % 3 == 0)
        {
            c += 2;
            b = (b + 1) / 3;
        }
        else if (b % 3 == 0)
        {
            c++;
            b = b / 3;
        }
        else
        {
            c++;
            b--;
        }
    }
    cout << c << endl;
}