import string
import sys
from itertools import count
from typing import Generator, List, Tuple


def input(): return sys.stdin.readline().rstrip('\n')


def main():
    a = int(input())
    ans = float('inf')
    for i in count(1):
        if a <= 3 ** i:
            ans = min(ans, 3 * i)
        if a <= 2 ** i:
            ans = min(ans, 2 * i)
            break
    return ans


if __name__ == '__main__':
    ret = main()


    def out(x):
        if isinstance(x, List) or isinstance(x, Tuple):
            print(*x)
        else:
            print(x)


    if ret is None:
        pass
    elif isinstance(ret, Generator):
        for val in ret:
            out(val)
    else:
        out(ret)