题解 | #汽水瓶#

for i in range(10):
    t=0
    try:
        num1=int(input())
    except:
        pass
    if num1==0:
        continue
    else:
        while True:
            num2=num1%3
            num1=int(num1/3)
            t=t+num1
            num1=num1+num2
            if num1==1:
                break
            elif num1==2:
                t=t+1
                break
    print(t)