def ternary_reverse(n):
    ternary = ""
    while n > 0:
        ternary += str(n % 3) 
        n = n // 3 

    result = 0
    power = 1
    i = 0
    while i < len(ternary):
        result += int(ternary[i]) * power
        power *= 3
        i += 1

    return result

n = 45
ret = ternary_reverse(n)
print(ret)