def func(a): sum = 0 while a >= 3: sum += a // 3 a = a // 3 + a % 3 return sum + 1 if a == 2 else sum while True: n = int(input()) if n == 0: break print(func(n))
def func(a): sum = 0 while a >= 3: sum += a // 3 a = a // 3 + a % 3 return sum + 1 if a == 2 else sum while True: n = int(input()) if n == 0: break print(func(n))