chisloVV = int(input())
deystviy = 0

while chisloVV != 1:
    if chisloVV % 3 == 0:
        chisloVV = chisloVV / 3
        deystviy += 1

    elif (chisloVV + 1) % 3 == 0:
        chisloVV = (chisloVV + 1) / 3
        deystviy += 2

    elif (chisloVV - 1) % 3 == 0:
        chisloVV = (chisloVV - 1) / 3
        deystviy += 2

    else:
        chisloVV = chisloVV - 1
        deystviy += 1

print(deystviy)