题解 | #汽水瓶#
汽水瓶
https://www.nowcoder.com/practice/fe298c55694f4ed39e256170ff2c205f
import sys
def f(n):
if n <= 1:
return 0
if n == 2:
return 1
return n//3 + f(n//3 + n%3)
for line in sys.stdin:
num = int(line)
# 输入的 0 表示输入结束
if num == 0:
break
print(f(num))
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