from math import log10

with open("przyklad.txt", "r") as file:
    line = file.readline().strip()


    potegi3 = 0
    while line != "":
        dec = int(line)

        l = log10(dec) / log10(3)
        if l == int(l):
            potegi3 += 1

        line = file.readline().strip()

    save = open("wyniki.txt", "w")
    save.write(str(potegi3))